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 | 8 |
| 3 | 38 |
| 4 | 178 |
| 5 | 844 |
| 6 | 4012 |
| 7 | 19072 |
| 8 | 90658 |
| 9 | 430938 |
| 10 | 2048450 |
| 11 | 9737260 |
| 12 | 46285868 |
| 13 | 220018976 |
| 14 | 1045856010 |
| 15 | 4971456754 |
| 16 | 23631725866 |
| 17 | 112332963420 |
| 18 | 533972624844 |
| 19 | 2538228811648 |
| 20 | 12065422836242 |
| 21 | 57352760145834 |
| 22 | 272625264866098 |
| 23 | 1295919060481740 |
| 24 | 6160126839867820 |