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 | 5 |
| 2 | 20 |
| 3 | 60 |
| 4 | 160 |
| 5 | 376 |
| 6 | 820 |
| 7 | 1660 |
| 8 | 3190 |
| 9 | 5830 |
| 10 | 10252 |
| 11 | 17380 |
| 12 | 28600 |
| 13 | 45760 |
| 14 | 71500 |
| 15 | 109252 |
| 16 | 163735 |
| 17 | 240955 |
| 18 | 348920 |
| 19 | 497640 |
| 20 | 700128 |
| 21 | 972400 |
| 22 | 1334840 |
| 23 | 1812200 |
| 24 | 2435420 |
| 25 | 3241628 |
| 26 | 4276520 |
| 27 | 5594360 |
| 28 | 7261040 |
| 29 | 9354080 |
| 30 | 11966504 |
| 31 | 15206840 |