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 | 19 |
| 2 | 361 |
| 3 | 702 |
| 4 | 1940 |
| 5 | 4160 |
| 6 | 10742 |
| 7 | 24952 |
| 8 | 61530 |
| 9 | 143916 |
| 10 | 341856 |
| 11 | 844144 |
| 12 | 1976858 |
| 13 | 4722206 |
| 14 | 11490150 |
| 15 | 27386568 |
| 16 | 65256342 |
| 17 | 157156516 |
| 18 | 378403428 |
| 19 | 901805910 |
| 20 | 2160944164 |
| 21 | 5211084366 |
| 22 | 12459269388 |
| 23 | 29798331568 |
| 24 | 71701305774 |
| 25 | 171968197128 |