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 | 2 |
| 2 | 20 |
| 3 | 90 |
| 4 | 272 |
| 5 | 650 |
| 6 | 1332 |
| 7 | 2450 |
| 8 | 4160 |
| 9 | 6642 |
| 10 | 10100 |
| 11 | 14762 |
| 12 | 20880 |
| 13 | 28730 |
| 14 | 38612 |
| 15 | 50850 |
| 16 | 65792 |
| 17 | 83810 |
| 18 | 105300 |
| 19 | 130682 |
| 20 | 160400 |
| 21 | 194922 |
| 22 | 234740 |
| 23 | 280370 |
| 24 | 332352 |
| 25 | 391250 |
| 26 | 457652 |
| 27 | 532170 |
| 28 | 615440 |
| 29 | 708122 |
| 30 | 810900 |
| 31 | 924482 |
| 32 | 1049600 |
| 33 | 1187010 |
| 34 | 1337492 |
| 35 | 1501850 |
| 36 | 1680912 |