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 | 44 |
| 2 | 164 |
| 3 | 603 |
| 4 | 1758 |
| 5 | 5130 |
| 6 | 13040 |
| 7 | 33223 |
| 8 | 77574 |
| 9 | 181559 |
| 10 | 401370 |
| 11 | 889157 |
| 12 | 1896644 |
| 13 | 4052667 |
| 14 | 8444892 |
| 15 | 17621165 |
| 16 | 36165014 |
| 17 | 74299430 |
| 18 | 151007392 |
| 19 | 307137335 |
| 20 | 620376066 |
| 21 | 1253727656 |
| 22 | 2522563936 |
| 23 | 5077320907 |
| 24 | 10191401694 |
| 25 | 20461362545 |