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) |
|---|---|
| 3 | 15 |
| 4 | 28 |
| 5 | 35 |
| 6 | 55 |
| 7 | 175 |
| 8 | 428 |
| 9 | 708 |
| 10 | 1459 |
| 11 | 3311 |
| 12 | 6871 |
| 13 | 13923 |
| 14 | 28431 |
| 15 | 61670 |
| 16 | 127340 |
| 17 | 263449 |
| 18 | 547948 |
| 19 | 1151856 |
| 20 | 2394523 |
| 21 | 4979101 |
| 22 | 10378999 |
| 23 | 21675453 |
| 24 | 45143495 |
| 25 | 94020460 |
| 26 | 196011703 |
| 27 | 408686829 |
| 28 | 851630367 |
| 29 | 1774581572 |
| 30 | 3699023950 |
| 31 | 7710064963 |
| 32 | 16068372396 |
| 33 | 33487738013 |