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 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 4 |
| 5 | 12 |
| 6 | 19 |
| 7 | 56 |
| 8 | 97 |
| 9 | 284 |
| 10 | 519 |
| 11 | 1516 |
| 12 | 2871 |
| 13 | 8380 |
| 14 | 16281 |
| 15 | 47517 |
| 16 | 94117 |
| 17 | 274733 |
| 18 | 552458 |
| 19 | 1613119 |
| 20 | 3283615 |
| 21 | 9590965 |
| 22 | 19720434 |
| 23 | 57620008 |
| 24 | 119480043 |
| 25 | 349217316 |
| 26 | 729363169 |
| 27 | 2132461957 |
| 28 | 4481537753 |
| 29 | 13106711534 |