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 | 0 |
| 2 | 4 |
| 3 | 10 |
| 4 | 26 |
| 5 | 56 |
| 6 | 116 |
| 7 | 228 |
| 8 | 436 |
| 9 | 814 |
| 10 | 1494 |
| 11 | 2704 |
| 12 | 4840 |
| 13 | 8584 |
| 14 | 15108 |
| 15 | 26418 |
| 16 | 45938 |
| 17 | 79496 |
| 18 | 136988 |
| 19 | 235180 |
| 20 | 402420 |
| 21 | 686550 |
| 22 | 1168174 |
| 23 | 1982880 |
| 24 | 3358416 |
| 25 | 5676816 |
| 26 | 9578116 |
| 27 | 16133338 |
| 28 | 27132746 |
| 29 | 45565784 |
| 30 | 76419524 |
| 31 | 128006004 |
| 32 | 214167220 |
| 33 | 357935614 |