A050722 Palindromic triangular numbers arising from A050721 and A083571.
3, 6, 66, 5995, 15051, 15199896744769899151
Offset: 1
Links
- P. De Geest, Subsets of palindromic triangulars
This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.