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 | 0 |
| 2 | 1 |
| 3 | 11 |
| 4 | 56 |
| 5 | 192 |
| 6 | 517 |
| 7 | 1183 |
| 8 | 2408 |
| 9 | 4488 |
| 10 | 7809 |
| 11 | 12859 |
| 12 | 20240 |
| 13 | 30680 |
| 14 | 45045 |
| 15 | 64351 |
| 16 | 89776 |
| 17 | 122672 |
| 18 | 164577 |
| 19 | 217227 |
| 20 | 282568 |
| 21 | 362768 |
| 22 | 460229 |
| 23 | 577599 |
| 24 | 717784 |
| 25 | 883960 |
| 26 | 1079585 |
| 27 | 1308411 |