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 | 1 |
| 2 | 3 |
| 3 | 10 |
| 4 | 23 |
| 5 | 56 |
| 6 | 132 |
| 7 | 259 |
| 8 | 546 |
| 9 | 1095 |
| 10 | 2043 |
| 11 | 3908 |
| 12 | 7379 |
| 13 | 13208 |
| 14 | 24194 |
| 15 | 43819 |
| 16 | 76790 |
| 17 | 136489 |
| 18 | 241311 |
| 19 | 416152 |
| 20 | 726073 |
| 21 | 1261696 |
| 22 | 2153026 |
| 23 | 3706393 |
| 24 | 6364842 |
| 25 | 10775173 |
| 26 | 18374181 |