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 | 1 |
| 2 | 15 |
| 3 | 70 |
| 4 | 219 |
| 5 | 546 |
| 6 | 1050 |
| 7 | 2150 |
| 8 | 3315 |
| 9 | 5299 |
| 10 | 8190 |
| 11 | 13542 |
| 12 | 15330 |
| 13 | 26690 |
| 14 | 32250 |
| 15 | 38220 |
| 16 | 51491 |
| 17 | 79170 |
| 18 | 79485 |
| 19 | 124166 |
| 20 | 119574 |
| 21 | 150500 |
| 22 | 203130 |
| 23 | 268710 |
| 24 | 232050 |
| 25 | 330771 |
| 26 | 400350 |
| 27 | 419020 |
| 28 | 470850 |
| 29 | 684546 |
| 30 | 573300 |
| 31 | 895622 |
| 32 | 811395 |
| 33 | 947940 |
| 34 | 1187550 |
| 35 | 1173900 |
| 36 | 1160481 |
| 37 | 1826210 |
| 38 | 1862490 |
| 39 | 1868300 |
| 40 | 1809990 |