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 | 1 |
| 1 | 3 |
| 2 | 4 |
| 3 | 5 |
| 4 | 6 |
| 5 | 13 |
| 6 | -6 |
| 7 | 45 |
| 8 | -50 |
| 9 | 113 |
| 10 | -98 |
| 11 | 73 |
| 12 | 274 |
| 13 | -1159 |
| 14 | 3563 |
| 15 | -8707 |
| 16 | 19024 |
| 17 | -36977 |
| 18 | 64582 |
| 19 | -98401 |
| 20 | 121436 |
| 21 | -81961 |
| 22 | -147383 |
| 23 | 860871 |
| 24 | -2709964 |
| 25 | 7110655 |
| 26 | -17077217 |
| 27 | 38873213 |
| 28 | -85085216 |
| 29 | 179965720 |
| 30 | -367884935 |
| 31 | 725051361 |
| 32 | -1372311916 |
| 33 | 2481473639 |
| 34 | -4257624155 |