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 | 51 |
| 2 | 221 |
| 3 | 631 |
| 4 | 1401 |
| 5 | 2651 |
| 6 | 4501 |
| 7 | 7071 |
| 8 | 10481 |
| 9 | 14851 |
| 10 | 20301 |
| 11 | 26951 |
| 12 | 34921 |
| 13 | 44331 |
| 14 | 55301 |
| 15 | 67951 |
| 16 | 82401 |
| 17 | 98771 |
| 18 | 117181 |
| 19 | 137751 |
| 20 | 160601 |
| 21 | 185851 |
| 22 | 213621 |
| 23 | 244031 |
| 24 | 277201 |
| 25 | 313251 |
| 26 | 352301 |
| 27 | 394471 |
| 28 | 439881 |
| 29 | 488651 |
| 30 | 540901 |
| 31 | 596751 |
| 32 | 656321 |
| 33 | 719731 |