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 | 22 |
| 4 | 58 |
| 5 | 142 |
| 6 | 334 |
| 7 | 766 |
| 8 | 1726 |
| 9 | 3837 |
| 10 | 8435 |
| 11 | 18364 |
| 12 | 39646 |
| 13 | 84986 |
| 14 | 181117 |
| 15 | 384160 |
| 16 | 811676 |
| 17 | 1709425 |
| 18 | 3590213 |
| 19 | 7522354 |
| 20 | 15728427 |
| 21 | 32827027 |
| 22 | 68405533 |
| 23 | 142344708 |
| 24 | 295824870 |
| 25 | 614046159 |
| 26 | 1273068141 |
| 27 | 2636250146 |
| 28 | 5452584131 |
| 29 | 11264148401 |
| 30 | 23242423457 |
| 31 | 47903544728 |