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 | 1 |
| 2 | 3 |
| 3 | 7 |
| 4 | 51 |
| 5 | 13 |
| 6 | 36 |
| 7 | 721 |
| 8 | 552 |
| 9 | 115 |
| 10 | 3201 |
| 11 | 7402 |
| 12 | 5904 |
| 13 | 1918 |
| 14 | 38361 |
| 15 | 76723 |
| 16 | 53556 |
| 17 | 170131 |
| 18 | 341262 |
| 19 | 782425 |
| 20 | 5758401 |
| 21 | 1517902 |
| 22 | 3034914 |
| 23 | 7068838 |
| 24 | 51277761 |
| 25 | 13445533 |
| 26 | 36880176 |
| 27 | 727712431 |
| 28 | 554534862 |
| 29 | 119078635 |
| 30 | 3281473701 |
| 31 | 7463847412 |
| 32 | 5927694924 |
| 33 | 1954399858 |