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 | 15 |
| 2 | 130 |
| 3 | 760 |
| 4 | 3355 |
| 5 | 12043 |
| 6 | 36935 |
| 7 | 100135 |
| 8 | 245870 |
| 9 | 556580 |
| 10 | 1177295 |
| 11 | 2351165 |
| 12 | 4469610 |
| 13 | 8141210 |
| 14 | 14284170 |
| 15 | 24247962 |
| 16 | 39970575 |
| 17 | 64178685 |
| 18 | 100639000 |
| 19 | 154470030 |
| 20 | 232524589 |
| 21 | 343854445 |
| 22 | 500269705 |
| 23 | 717006745 |
| 24 | 1013519780 |
| 25 | 1414412506 |
| 26 | 1950527645 |
| 27 | 2660213675 |
| 28 | 3590789540 |
| 29 | 4800229700 |