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 | 36 |
| 2 | 540 |
| 3 | 4356 |
| 4 | 20556 |
| 5 | 60696 |
| 6 | 137916 |
| 7 | 325152 |
| 8 | 658476 |
| 9 | 1023012 |
| 10 | 1999080 |
| 11 | 3112560 |
| 12 | 4446828 |
| 13 | 7207992 |
| 14 | 10755936 |
| 15 | 13150296 |
| 16 | 20963052 |
| 17 | 27538056 |
| 18 | 33706908 |
| 19 | 47989008 |
| 20 | 64050696 |
| 21 | 70696224 |
| 22 | 103079952 |
| 23 | 124752096 |
| 24 | 142308684 |
| 25 | 189312156 |
| 26 | 237450312 |
| 27 | 248276484 |
| 28 | 344385504 |
| 29 | 397677816 |