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 | 24 |
| 2 | 684 |
| 3 | 17880 |
| 4 | 493785 |
| 5 | 13108608 |
| 6 | 358702272 |
| 7 | 9579537792 |
| 8 | 261039317220 |
| 9 | 6992695897440 |
| 10 | 190104989730480 |
| 11 | 5101807912472160 |
| 12 | 138496042650288420 |
| 13 | 3721234160086727040 |
| 14 | 100918032317551270080 |
| 15 | 2713823288825315967360 |
| 16 | 73545091414048811297745 |