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 | 3 |
| 2 | 6 |
| 3 | 12 |
| 4 | 24 |
| 5 | 48 |
| 6 | 90 |
| 7 | 168 |
| 8 | 318 |
| 9 | 594 |
| 10 | 1092 |
| 11 | 2004 |
| 12 | 3678 |
| 13 | 6720 |
| 14 | 12210 |
| 15 | 22128 |
| 16 | 40074 |
| 17 | 72372 |
| 18 | 130380 |
| 19 | 234432 |
| 20 | 421128 |
| 21 | 755208 |
| 22 | 1352328 |
| 23 | 2418246 |
| 24 | 4320552 |
| 25 | 7709898 |
| 26 | 13744764 |
| 27 | 24477618 |
| 28 | 43560444 |
| 29 | 77448330 |
| 30 | 137602440 |
| 31 | 244277016 |
| 32 | 433399824 |
| 33 | 768379830 |
| 34 | 1361530134 |