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 | 6 |
| 2 | 14 |
| 3 | 26 |
| 4 | 34 |
| 5 | 6 |
| 6 | -146 |
| 7 | -614 |
| 8 | -1726 |
| 9 | -3834 |
| 10 | -6706 |
| 11 | -7654 |
| 12 | 2914 |
| 13 | 49926 |
| 14 | 185134 |
| 15 | 490906 |
| 16 | 1037954 |
| 17 | 1697286 |
| 18 | 1599374 |
| 19 | -2088934 |
| 20 | -16352606 |
| 21 | -54965754 |
| 22 | -138099986 |
| 23 | -277571174 |
| 24 | -419784766 |
| 25 | -291283194 |
| 26 | 933791054 |
| 27 | 5191580186 |
| 28 | 16097365474 |
| 29 | 38431560966 |
| 30 | 73239416494 |
| 31 | 100799861146 |