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 | 1 |
| 1 | 5 |
| 2 | 34 |
| 3 | 293 |
| 4 | 3052 |
| 5 | 37247 |
| 6 | 520918 |
| 7 | 8211065 |
| 8 | 143997160 |
| 9 | 2780465147 |
| 10 | 58611713434 |
| 11 | 1339236707525 |
| 12 | 32969142927580 |
| 13 | 869913580853735 |
| 14 | 24490615055384062 |
| 15 | 732751463209179953 |
| 16 | 23217990692393685712 |
| 17 | 776689510407852177011 |
| 18 | 27353286267329098887202 |