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 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 3 |
| 5 | 11 |
| 6 | 31 |
| 7 | 71 |
| 8 | 145 |
| 9 | 289 |
| 10 | 601 |
| 11 | 1321 |
| 12 | 2979 |
| 13 | 6683 |
| 14 | 14743 |
| 15 | 32111 |
| 16 | 69697 |
| 17 | 151777 |
| 18 | 332113 |
| 19 | 728689 |
| 20 | 1598883 |
| 21 | 3503627 |
| 22 | 7668079 |
| 23 | 16774775 |
| 24 | 36704017 |
| 25 | 80343361 |
| 26 | 175916521 |
| 27 | 385196761 |
| 28 | 843365379 |
| 29 | 1846290395 |
| 30 | 4041672871 |
| 31 | 8847607391 |