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 | 0 |
| 3 | 0 |
| 4 | 4 |
| 5 | 8 |
| 6 | 22 |
| 7 | 44 |
| 8 | 80 |
| 9 | 144 |
| 10 | 254 |
| 11 | 508 |
| 12 | 760 |
| 13 | 1520 |
| 14 | 2528 |
| 15 | 3968 |
| 16 | 5312 |
| 17 | 10624 |
| 18 | 14560 |
| 19 | 29120 |
| 20 | 40784 |
| 21 | 60544 |
| 22 | 95744 |
| 23 | 191488 |
| 24 | 242368 |
| 25 | 339520 |
| 26 | 531712 |
| 27 | 676864 |
| 28 | 916768 |
| 29 | 1833536 |
| 30 | 2331776 |
| 31 | 4663552 |
| 32 | 5527552 |
| 33 | 7862272 |
| 34 | 12163072 |
| 35 | 16420864 |
| 36 | 19593472 |