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 | 0 |
| 2 | 0 |
| 3 | 15 |
| 4 | 194 |
| 5 | 1974 |
| 6 | 9856 |
| 7 | 34475 |
| 8 | 95466 |
| 9 | 224589 |
| 10 | 468854 |
| 11 | 893646 |
| 12 | 1585850 |
| 13 | 2656976 |
| 14 | 4246284 |
| 15 | 6523909 |
| 16 | 9693986 |
| 17 | 13997775 |
| 18 | 19716786 |
| 19 | 27175904 |
| 20 | 36746514 |
| 21 | 48849626 |
| 22 | 63959000 |
| 23 | 82604271 |
| 24 | 105374074 |
| 25 | 132919169 |