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 | 5 |
| 2 | 4 |
| 3 | 8 |
| 4 | 15 |
| 5 | 36 |
| 6 | 74 |
| 7 | 180 |
| 8 | 411 |
| 9 | 996 |
| 10 | 2400 |
| 11 | 5940 |
| 12 | 14707 |
| 13 | 36972 |
| 14 | 93276 |
| 15 | 237264 |
| 16 | 606030 |
| 17 | 1556028 |
| 18 | 4009118 |
| 19 | 10367892 |
| 20 | 26888925 |
| 21 | 69930264 |
| 22 | 182296212 |
| 23 | 476262756 |
| 24 | 1246695079 |
| 25 | 3269321352 |
| 26 | 8587452204 |
| 27 | 22590645408 |
| 28 | 59510993607 |
| 29 | 156973954860 |
| 30 | 414552239458 |
| 31 | 1096017973380 |
| 32 | 2900753084400 |
| 33 | 7684758670248 |
| 34 | 20377460964156 |
| 35 | 54081265456116 |