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 | 21 |
| 2 | 357 |
| 3 | 406 |
| 4 | 490 |
| 5 | 584 |
| 6 | 827 |
| 7 | 1090 |
| 8 | 1914 |
| 9 | 3262 |
| 10 | 6228 |
| 11 | 10226 |
| 12 | 17114 |
| 13 | 25534 |
| 14 | 41034 |
| 15 | 61778 |
| 16 | 102644 |
| 17 | 163334 |
| 18 | 278554 |
| 19 | 446898 |
| 20 | 747274 |
| 21 | 1175494 |
| 22 | 1926612 |
| 23 | 3021594 |
| 24 | 4960170 |
| 25 | 7880334 |
| 26 | 13028058 |
| 27 | 20841466 |
| 28 | 34355316 |
| 29 | 54835150 |
| 30 | 89785130 |