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 | 1 |
| 1 | 42 |
| 2 | 684 |
| 3 | 4388 |
| 4 | 17976 |
| 5 | 56076 |
| 6 | 145630 |
| 7 | 331410 |
| 8 | 682596 |
| 9 | 1300338 |
| 10 | 2326422 |
| 11 | 3952896 |
| 12 | 6432777 |
| 13 | 10091748 |
| 14 | 15340947 |
| 15 | 22690710 |
| 16 | 32765418 |
| 17 | 46319334 |
| 18 | 64253491 |
| 19 | 87633588 |
| 20 | 117708960 |
| 21 | 155932526 |
| 22 | 203981823 |
| 23 | 263781030 |
| 24 | 337524061 |
| 25 | 427698636 |
| 26 | 537111456 |
| 27 | 668914338 |
| 28 | 826631436 |