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 | 1 |
| 8 | 6 |
| 9 | 21 |
| 10 | 56 |
| 11 | 126 |
| 12 | 254 |
| 13 | 480 |
| 14 | 882 |
| 15 | 1617 |
| 16 | 2992 |
| 17 | 5580 |
| 18 | 10410 |
| 19 | 19292 |
| 20 | 35400 |
| 21 | 64343 |
| 22 | 116128 |
| 23 | 208701 |
| 24 | 374226 |
| 25 | 670095 |
| 26 | 1198164 |
| 27 | 2138423 |
| 28 | 3808148 |
| 29 | 6766089 |
| 30 | 11996042 |
| 31 | 21229790 |
| 32 | 37513896 |
| 33 | 66202347 |
| 34 | 116692472 |
| 35 | 205458357 |
| 36 | 361349662 |
| 37 | 634845141 |
| 38 | 1114205988 |