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 | 5 |
| 2 | 16 |
| 3 | 40 |
| 4 | 79 |
| 5 | 110 |
| 6 | 23 |
| 7 | -520 |
| 8 | -2336 |
| 9 | -6995 |
| 10 | -16574 |
| 11 | -31075 |
| 12 | -38848 |
| 13 | 9560 |
| 14 | 258631 |
| 15 | 1043950 |
| 16 | 2978719 |
| 17 | 6781640 |
| 18 | 12060848 |
| 19 | 13119125 |
| 20 | -12022526 |
| 21 | -124662155 |
| 22 | -461573264 |
| 23 | -1259138680 |
| 24 | -2752822273 |
| 25 | -4615067410 |
| 26 | -4134056729 |
| 27 | 8360350360 |
| 28 | 58685747584 |
| 29 | 202130368445 |
| 30 | 528415922498 |