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 | 55 |
| 2 | 2385 |
| 3 | 54793 |
| 4 | 465336 |
| 5 | 2780392 |
| 6 | 12025596 |
| 7 | 43129809 |
| 8 | 129984123 |
| 9 | 351172313 |
| 10 | 852813984 |
| 11 | 1922215028 |
| 12 | 4035429570 |
| 13 | 8030912421 |
| 14 | 15179187087 |
| 15 | 27570308959 |
| 16 | 48164526258 |
| 17 | 81559118508 |
| 18 | 133992393064 |
| 19 | 214705512971 |
| 20 | 335752649443 |