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 | 3 |
| 2 | 8 |
| 3 | 19 |
| 4 | 44 |
| 5 | 97 |
| 6 | 207 |
| 7 | 432 |
| 8 | 884 |
| 9 | 1777 |
| 10 | 3529 |
| 11 | 6942 |
| 12 | 13547 |
| 13 | 26281 |
| 14 | 50791 |
| 15 | 97942 |
| 16 | 188677 |
| 17 | 363489 |
| 18 | 700953 |
| 19 | 1354060 |
| 20 | 2621602 |
| 21 | 5088832 |
| 22 | 9905382 |
| 23 | 19335477 |
| 24 | 37848971 |
| 25 | 74287855 |
| 26 | 146173721 |
| 27 | 288280956 |
| 28 | 569715036 |
| 29 | 1127957956 |
| 30 | 2236777539 |
| 31 | 4441749653 |
| 32 | 8830819362 |
| 33 | 17574636239 |
| 34 | 35005944165 |
| 35 | 69776276002 |
| 36 | 139165947494 |