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 | 7 |
| 2 | 35 |
| 3 | 140 |
| 4 | 490 |
| 5 | 1547 |
| 6 | 4522 |
| 7 | 12405 |
| 8 | 32305 |
| 9 | 80465 |
| 10 | 192899 |
| 11 | 447146 |
| 12 | 1006145 |
| 13 | 2204475 |
| 14 | 4715510 |
| 15 | 9869132 |
| 16 | 20247710 |
| 17 | 40786690 |
| 18 | 80782800 |
| 19 | 157510780 |
| 20 | 302666903 |
| 21 | 573720808 |
| 22 | 1073720305 |
| 23 | 1985506775 |
| 24 | 3630307835 |
| 25 | 6567206471 |
| 26 | 11760658378 |
| 27 | 20860415590 |
| 28 | 36665885170 |
| 29 | 63891010155 |
| 30 | 110415782785 |
| 31 | 189320804673 |
| 32 | 322174588225 |