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.
| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 22 |
| 4 | 1415 |
| 5 | 140343 |
| 6 | 20167651 |
| 7 | 3980871156 |
| 8 | 1035707510307 |
| 9 | 343866839138005 |
| 10 | 141979144588872613 |
| 11 | 71386289535825383386 |
| 12 | 42954342000612934599071 |
| 13 | 30482693813120122213093587 |
| 14 | 25196997894058490607106028095 |
| 15 | 24001522306527907199721466108488 |
| 16 | 26102037346800387738363882455862531 |