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 | 2 |
| 4 | 7 |
| 5 | 13 |
| 6 | 48 |
| 7 | 95 |
| 8 | 424 |
| 9 | 898 |
| 10 | 4837 |
| 11 | 10780 |
| 12 | 68399 |
| 13 | 158111 |
| 14 | 1156224 |
| 15 | 2745145 |
| 16 | 22744380 |
| 17 | 55098660 |
| 18 | 510307001 |
| 19 | 1255610350 |
| 20 | 12859037607 |
| 21 | 32030878113 |
| 22 | 359498491968 |
| 23 | 904385401323 |
| 24 | 11040700820704 |
| 25 | 28000658588542 |