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) |
|---|---|
| 3 | 1 |
| 4 | 6 |
| 5 | 20 |
| 6 | 52 |
| 7 | 111 |
| 8 | 214 |
| 9 | 376 |
| 10 | 620 |
| 11 | 967 |
| 12 | 1452 |
| 13 | 2096 |
| 14 | 2952 |
| 15 | 4047 |
| 16 | 5422 |
| 17 | 7128 |
| 18 | 9236 |
| 19 | 11773 |
| 20 | 14834 |
| 21 | 18450 |
| 22 | 22704 |
| 23 | 27675 |
| 24 | 33460 |
| 25 | 40090 |
| 26 | 47708 |
| 27 | 56383 |
| 28 | 66214 |
| 29 | 77276 |
| 30 | 89748 |
| 31 | 103647 |
| 32 | 119206 |
| 33 | 136476 |
| 34 | 155592 |
| 35 | 176681 |
| 36 | 199858 |
| 37 | 225224 |
| 38 | 253104 |
| 39 | 283555 |
| 40 | 316692 |