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 | 22 |
| 4 | 37 |
| 5 | 76 |
| 6 | 194 |
| 7 | 491 |
| 8 | 1125 |
| 9 | 2731 |
| 10 | 6640 |
| 11 | 15962 |
| 12 | 38386 |
| 13 | 92639 |
| 14 | 223403 |
| 15 | 538102 |
| 16 | 1297061 |
| 17 | 3126726 |
| 18 | 7535759 |
| 19 | 18162481 |
| 20 | 43777272 |
| 21 | 105514634 |
| 22 | 254314406 |
| 23 | 612962766 |
| 24 | 1477397778 |
| 25 | 3560896401 |
| 26 | 8582652759 |
| 27 | 20686361179 |
| 28 | 49859334611 |
| 29 | 120173522734 |
| 30 | 289648431514 |