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 | 1 |
| 2 | 0 |
| 3 | 3 |
| 4 | 1 |
| 5 | 9 |
| 6 | 6 |
| 7 | 28 |
| 8 | 27 |
| 9 | 90 |
| 10 | 110 |
| 11 | 297 |
| 12 | 429 |
| 13 | 1001 |
| 14 | 1638 |
| 15 | 3432 |
| 16 | 6188 |
| 17 | 11934 |
| 18 | 23256 |
| 19 | 41990 |
| 20 | 87210 |
| 21 | 149226 |
| 22 | 326876 |
| 23 | 534888 |
| 24 | 1225785 |
| 25 | 1931540 |
| 26 | 4601610 |
| 27 | 7020405 |
| 28 | 17298645 |
| 29 | 25662825 |
| 30 | 65132550 |
| 31 | 94287120 |
| 32 | 245642760 |
| 33 | 347993910 |
| 34 | 927983760 |
| 35 | 1289624490 |
| 36 | 3511574910 |