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 | 97 |
| 2 | 2340 |
| 3 | 18817 |
| 4 | 453948 |
| 5 | 3650401 |
| 6 | 88063572 |
| 7 | 708158977 |
| 8 | 17083879020 |
| 9 | 137379191137 |
| 10 | 3314184466308 |
| 11 | 26650854921601 |
| 12 | 642934702584732 |
| 13 | 5170128475599457 |
| 14 | 124726018116971700 |
| 15 | 1002978273411373057 |
| 16 | 24196204579989925068 |
| 17 | 194572614913330773601 |