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 | 12 |
| 1 | 134 |
| 2 | 1487 |
| 3 | 16492 |
| 4 | 182900 |
| 5 | 2028393 |
| 6 | 22495224 |
| 7 | 249475858 |
| 8 | 2766729663 |
| 9 | 30683502152 |
| 10 | 340285253336 |
| 11 | 3773821288849 |
| 12 | 41852319430676 |
| 13 | 464149335026286 |
| 14 | 5147495004719823 |
| 15 | 57086594386944340 |
| 16 | 633100033261107564 |
| 17 | 7021186960259127545 |
| 18 | 77866156596111510560 |