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) |
|---|---|
| 1 | 12 |
| 2 | 144 |
| 3 | 1156 |
| 4 | 8900 |
| 5 | 65760 |
| 6 | 481552 |
| 7 | 3510380 |
| 8 | 25556548 |
| 9 | 185975588 |
| 10 | 1353139492 |
| 11 | 9844797788 |
| 12 | 71624858188 |
| 13 | 521097138012 |
| 14 | 3791166287372 |
| 15 | 27582062117196 |
| 16 | 200669125155708 |
| 17 | 1459937829727116 |
| 18 | 10621556383444668 |
| 19 | 77275523001250188 |