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 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 1 |
| 9 | 7 |
| 10 | 34 |
| 11 | 136 |
| 12 | 487 |
| 13 | 1608 |
| 14 | 5024 |
| 15 | 15054 |
| 16 | 43716 |
| 17 | 123861 |
| 18 | 344195 |
| 19 | 941542 |
| 20 | 2542583 |
| 21 | 6792588 |
| 22 | 17982215 |
| 23 | 47235074 |
| 24 | 123239673 |
| 25 | 319643026 |
| 26 | 824718481 |
| 27 | 2117962664 |
| 28 | 5416370537 |
| 29 | 13799074169 |
| 30 | 35034120821 |
| 31 | 88666584633 |
| 32 | 223752019933 |