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 | 16 |
| 3 | 119 |
| 4 | 560 |
| 5 | 1955 |
| 6 | 5552 |
| 7 | 13573 |
| 8 | 29632 |
| 9 | 59229 |
| 10 | 110320 |
| 11 | 193963 |
| 12 | 325040 |
| 13 | 523055 |
| 14 | 813008 |
| 15 | 1226345 |
| 16 | 1801984 |
| 17 | 2587417 |
| 18 | 3639888 |
| 19 | 5027647 |
| 20 | 6831280 |
| 21 | 9145115 |
| 22 | 12078704 |
| 23 | 15758381 |
| 24 | 20328896 |
| 25 | 25955125 |
| 26 | 32823856 |
| 27 | 41145651 |
| 28 | 51156784 |
| 29 | 63121255 |
| 30 | 77332880 |
| 31 | 94117457 |