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 | 3 |
| 2 | 13 |
| 3 | 59 |
| 4 | 285 |
| 5 | 1419 |
| 6 | 7245 |
| 7 | 37659 |
| 8 | 198589 |
| 9 | 1059371 |
| 10 | 5705517 |
| 11 | 30976571 |
| 12 | 169338781 |
| 13 | 931239243 |
| 14 | 5147825421 |
| 15 | 28587660123 |
| 16 | 159406327677 |
| 17 | 892113040491 |
| 18 | 5009160335085 |
| 19 | 28210229053563 |
| 20 | 159304938535773 |
| 21 | 901845743050635 |
| 22 | 5117144607546573 |
| 23 | 29096321095698843 |
| 24 | 165765778648482621 |