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) |
|---|---|
| 4 | 15 |
| 5 | 31 |
| 6 | 60 |
| 7 | 113 |
| 8 | 215 |
| 9 | 406 |
| 10 | 763 |
| 11 | 1431 |
| 12 | 2676 |
| 13 | 4993 |
| 14 | 9299 |
| 15 | 17290 |
| 16 | 32103 |
| 17 | 59535 |
| 18 | 110292 |
| 19 | 204137 |
| 20 | 377535 |
| 21 | 697742 |
| 22 | 1288763 |
| 23 | 2379167 |
| 24 | 4390148 |
| 25 | 8097681 |
| 26 | 14931075 |
| 27 | 27522586 |
| 28 | 50719103 |
| 29 | 93444207 |
| 30 | 172125100 |
| 31 | 316999057 |
| 32 | 583718215 |
| 33 | 1074702870 |
| 34 | 1978430491 |
| 35 | 3641722423 |