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 | 5 |
| 3 | 23 |
| 4 | 103 |
| 5 | 462 |
| 6 | 2086 |
| 7 | 9493 |
| 8 | 43521 |
| 9 | 200855 |
| 10 | 932429 |
| 11 | 4350995 |
| 12 | 20395349 |
| 13 | 95987113 |
| 14 | 453354623 |
| 15 | 2148027772 |
| 16 | 10206485598 |
| 17 | 48621125308 |
| 18 | 232156538970 |
| 19 | 1110842790406 |
| 20 | 5325499426116 |
| 21 | 25576096186920 |
| 22 | 123030491611330 |