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 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 16 |
| 4 | 78 |
| 5 | 228 |
| 6 | 520 |
| 7 | 1020 |
| 8 | 1806 |
| 9 | 2968 |
| 10 | 4608 |
| 11 | 6840 |
| 12 | 9790 |
| 13 | 13596 |
| 14 | 18408 |
| 15 | 24388 |
| 16 | 31710 |
| 17 | 40560 |
| 18 | 51136 |
| 19 | 63648 |
| 20 | 78318 |
| 21 | 95380 |
| 22 | 115080 |
| 23 | 137676 |
| 24 | 163438 |
| 25 | 192648 |
| 26 | 225600 |
| 27 | 262600 |
| 28 | 303966 |
| 29 | 350028 |
| 30 | 401128 |
| 31 | 457620 |
| 32 | 519870 |
| 33 | 588256 |