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 | 0 |
| 1 | 1 |
| 2 | 112 |
| 3 | 783 |
| 4 | 2839 |
| 5 | 7480 |
| 6 | 16281 |
| 7 | 31192 |
| 8 | 54538 |
| 9 | 89019 |
| 10 | 137710 |
| 11 | 204061 |
| 12 | 291897 |
| 13 | 405418 |
| 14 | 549199 |
| 15 | 728190 |
| 16 | 947716 |
| 17 | 1213477 |
| 18 | 1531548 |
| 19 | 1908379 |
| 20 | 2350795 |
| 21 | 2865996 |
| 22 | 3461557 |
| 23 | 4145428 |
| 24 | 4925934 |
| 25 | 5811775 |
| 26 | 6812026 |
| 27 | 7936137 |
| 28 | 9193933 |
| 29 | 10595614 |
| 30 | 12151755 |
| 31 | 13873306 |