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) |
|---|---|
| 0 | 3 |
| 1 | 3 |
| 2 | 5 |
| 3 | 12 |
| 4 | 37 |
| 5 | 138 |
| 6 | 605 |
| 7 | 3042 |
| 8 | 17257 |
| 9 | 108978 |
| 10 | 758105 |
| 11 | 5759322 |
| 12 | 47439277 |
| 13 | 421090218 |
| 14 | 4006875605 |
| 15 | 40686781602 |
| 16 | 439122198097 |
| 17 | 5019624693858 |
| 18 | 60582649901105 |
| 19 | 769831261587882 |
| 20 | 10273367294485717 |
| 21 | 143649246839399898 |
| 22 | 2100196647406842605 |
| 23 | 32044492213621026162 |
| 24 | 509357494543973054137 |