https://randompasswordgenerator.com has that feature. PS: in case you didn't notice, I linked the url with the actual custom sequence you need. More on reddit.com

Id love for someone to do a proper test of this however I must make one thing clear. There is nothing to suggest that it isn't random if your only data point is 2 passwords that are earily similar. Idk how many passwords you generate or or long or inclusive your passwords are (symbols numbers etc) But random sets DO generate patterns by definition. 100 coin flips on average will have 1 set of 8 heads/tails consecutively and 2 or 3 sets of 7. (Could be getting this slightly wrong but I hope my point is clear) random data sets will result in patterns. This is because that is how randomization works On a large enough dataset patterns or duplicates will immerse. That all being said if dashlane doenst use a proper randomization process, depending on how you use it will depend on whether its still secure, and how the information is transmitted. But this is NOT something a user should have to know. It should be as simple as click a button and go. If its not dashlane needs to fix their shit for sure. Modern high security will use physical and chaotic events to support their cryptography. The most well known is walls of lava lamps being filmed in many places around the world, using lava lamps to generate numbers is great because the physics of lava lamps is random, or at least a great example of chaotic motion. Dashlane should be using something similar as part of its randomization seed process. Most random requests are handled by taking thermal and time data from the device they are being ran on because its quick, simple, and usually random enough, and very difficult to replicate, if not impossible without the right data. More on reddit.com

I use memorable passwords for things I need to log into without the assistance of 1password. Or things that I might possibly need to log into without 1pw. My devices themselves get memorable passwords, along with a handful of other things. Everything else gets a 50-character alphanumeric password (unless the service in question is still living in the 19th century and imposes a password length limit, then it gets the longest possible alphanumeric password). More on reddit.com

I use dinopass.com for passwords for users, I just don't tell them it came from a password generator for kids More on reddit.com