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 | 5 |
| 1 | 36 |
| 2 | 148 |
| 3 | 456 |
| 4 | 1170 |
| 5 | 2640 |
| 6 | 5412 |
| 7 | 10296 |
| 8 | 18447 |
| 9 | 31460 |
| 10 | 51480 |
| 11 | 81328 |
| 12 | 124644 |
| 13 | 186048 |
| 14 | 271320 |
| 15 | 387600 |
| 16 | 543609 |
| 17 | 749892 |
| 18 | 1019084 |
| 19 | 1366200 |
| 20 | 1808950 |
| 21 | 2368080 |
| 22 | 3067740 |
| 23 | 3935880 |
| 24 | 5004675 |
| 25 | 6310980 |
| 26 | 7896816 |
| 27 | 9809888 |
| 28 | 12104136 |
| 29 | 14840320 |