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 | 169 |
| 4 | 391 |
| 5 | 1546 |
| 6 | 16761 |
| 7 | 18278 |
| 8 | 20201 |
| 9 | 21775 |
| 10 | 31120 |
| 11 | 126882 |
| 12 | 178465 |
| 13 | 9502273 |
| 14 | 10553442 |
| 15 | 24677776 |
| 16 | 56923413 |
| 17 | 422766345 |
| 18 | 1759518201 |
| 19 | 4152696703 |
| 20 | 6800832991 |
| 21 | 14421293461 |
| 22 | 106195400697 |
| 23 | 667339219893 |
| 24 | 915091102299 |