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 | 1 |
| 1 | 15 |
| 2 | 75 |
| 3 | 245 |
| 4 | 630 |
| 5 | 1386 |
| 6 | 2730 |
| 7 | 4950 |
| 8 | 8415 |
| 9 | 13585 |
| 10 | 21021 |
| 11 | 31395 |
| 12 | 45500 |
| 13 | 64260 |
| 14 | 88740 |
| 15 | 120156 |
| 16 | 159885 |
| 17 | 209475 |
| 18 | 270655 |
| 19 | 345345 |
| 20 | 435666 |
| 21 | 543950 |
| 22 | 672750 |
| 23 | 824850 |
| 24 | 1003275 |
| 25 | 1211301 |
| 26 | 1452465 |
| 27 | 1730575 |
| 28 | 2049720 |
| 29 | 2414280 |
| 30 | 2828936 |
| 31 | 3298680 |
| 32 | 3828825 |
| 33 | 4425015 |
| 34 | 5093235 |