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 | 22 |
| 2 | 484 |
| 3 | 6166 |
| 4 | 51136 |
| 5 | 310396 |
| 6 | 1492552 |
| 7 | 5995781 |
| 8 | 20879061 |
| 9 | 64727664 |
| 10 | 182215264 |
| 11 | 472897132 |
| 12 | 1144905802 |
| 13 | 2610251996 |
| 14 | 5646952970 |
| 15 | 11664925145 |
| 16 | 23128319257 |
| 17 | 44207709722 |
| 18 | 81762385076 |
| 19 | 146787187114 |
| 20 | 256501341004 |
| 21 | 437310109972 |