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 | 0 |
| 1 | 0 |
| 2 | 2 |
| 3 | 5 |
| 4 | 12 |
| 5 | 26 |
| 6 | 55 |
| 7 | 114 |
| 8 | 234 |
| 9 | 477 |
| 10 | 968 |
| 11 | 1958 |
| 12 | 3951 |
| 13 | 7958 |
| 14 | 16006 |
| 15 | 32157 |
| 16 | 64548 |
| 17 | 129474 |
| 18 | 259559 |
| 19 | 520106 |
| 20 | 1041810 |
| 21 | 2086205 |
| 22 | 4176592 |
| 23 | 8359950 |
| 24 | 16730847 |
| 25 | 33479406 |
| 26 | 66987470 |
| 27 | 134021309 |
| 28 | 268117644 |
| 29 | 536356682 |
| 30 | 1072909783 |
| 31 | 2146137378 |
| 32 | 4292788986 |
| 33 | 8586410013 |