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 | 2 |
| 1 | 3 |
| 2 | 7 |
| 3 | 13 |
| 4 | 30 |
| 5 | 56 |
| 6 | 127 |
| 7 | 237 |
| 8 | 530 |
| 9 | 994 |
| 10 | 2192 |
| 11 | 4144 |
| 12 | 9016 |
| 13 | 17192 |
| 14 | 36949 |
| 15 | 71023 |
| 16 | 151024 |
| 17 | 292340 |
| 18 | 616032 |
| 19 | 1199556 |
| 20 | 2508660 |
| 21 | 4909028 |
| 22 | 10201810 |
| 23 | 20044004 |
| 24 | 41437560 |
| 25 | 81683022 |
| 26 | 168134730 |
| 27 | 332321130 |
| 28 | 681582636 |
| 29 | 1350091410 |
| 30 | 2760703019 |