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 | 1 |
| 1 | 2 |
| 2 | 7 |
| 3 | 26 |
| 4 | 98 |
| 5 | 371 |
| 6 | 1406 |
| 7 | 5329 |
| 8 | 20196 |
| 9 | 76532 |
| 10 | 289997 |
| 11 | 1098826 |
| 12 | 4163483 |
| 13 | 15775426 |
| 14 | 59772826 |
| 15 | 226477879 |
| 16 | 858118966 |
| 17 | 3251390237 |
| 18 | 12319431012 |
| 19 | 46677994276 |
| 20 | 176861668393 |
| 21 | 670124115506 |
| 22 | 2539082288671 |
| 23 | 9620514646154 |
| 24 | 36451871795186 |