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 | 1 |
| 2 | 4 |
| 3 | 15 |
| 4 | 92 |
| 5 | 653 |
| 6 | 5897 |
| 7 | 9323 |
| 8 | 84626 |
| 9 | 433832 |
| 10 | 795028 |
| 11 | 841971 |
| 12 | 6939937 |
| 13 | 51058209 |
| 14 | 74944592 |
| 15 | 307816406 |
| 16 | 2862089986 |
| 17 | 28034825342 |
| 18 | 1170679821480 |
| 19 | 8651328230664 |
| 20 | 70938446095505 |
| 21 | 82231725359408 |
| 22 | 128481117450284 |
| 23 | 1027019385211055 |