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 | 19 |
| 3 | 134 |
| 4 | 586 |
| 5 | 1919 |
| 6 | 5173 |
| 7 | 12124 |
| 8 | 25572 |
| 9 | 49677 |
| 10 | 90343 |
| 11 | 155650 |
| 12 | 256334 |
| 13 | 406315 |
| 14 | 623273 |
| 15 | 929272 |
| 16 | 1351432 |
| 17 | 1922649 |
| 18 | 2682363 |
| 19 | 3677374 |
| 20 | 4962706 |
| 21 | 6602519 |
| 22 | 8671069 |
| 23 | 11253716 |
| 24 | 14447980 |
| 25 | 18364645 |
| 26 | 23128911 |
| 27 | 28881594 |
| 28 | 35780374 |
| 29 | 44001091 |