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 | 1 |
| 2 | 7 |
| 3 | 25 |
| 4 | 86 |
| 5 | 252 |
| 6 | 676 |
| 7 | 1656 |
| 8 | 3788 |
| 9 | 8150 |
| 10 | 16660 |
| 11 | 32540 |
| 12 | 61108 |
| 13 | 110780 |
| 14 | 194668 |
| 15 | 332578 |
| 16 | 553981 |
| 17 | 901723 |
| 18 | 1437269 |
| 19 | 2247151 |
| 20 | 3451798 |
| 21 | 5216252 |
| 22 | 7764392 |
| 23 | 11396054 |
| 24 | 16509188 |
| 25 | 23626234 |
| 26 | 33427622 |
| 27 | 46791278 |
| 28 | 64841876 |
| 29 | 89008530 |
| 30 | 121095602 |
| 31 | 163364972 |