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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 7 |
| 6 | 21 |
| 7 | 49 |
| 8 | 98 |
| 9 | 177 |
| 10 | 296 |
| 11 | 465 |
| 12 | 698 |
| 13 | 1009 |
| 14 | 1413 |
| 15 | 1927 |
| 16 | 2569 |
| 17 | 3360 |
| 18 | 4320 |
| 19 | 5472 |
| 20 | 6840 |
| 21 | 8449 |
| 22 | 10327 |
| 23 | 12501 |
| 24 | 15001 |
| 25 | 17858 |
| 26 | 21105 |
| 27 | 24776 |
| 28 | 28905 |
| 29 | 33530 |
| 30 | 38689 |
| 31 | 44421 |
| 32 | 50767 |
| 33 | 57769 |
| 34 | 65472 |
| 35 | 73920 |