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 | 8 |
| 2 | 43 |
| 3 | 176 |
| 4 | 611 |
| 5 | 1864 |
| 6 | 5161 |
| 7 | 13184 |
| 8 | 31532 |
| 9 | 71264 |
| 10 | 153444 |
| 11 | 316608 |
| 12 | 629236 |
| 13 | 1209312 |
| 14 | 2255324 |
| 15 | 4093056 |
| 16 | 7246690 |
| 17 | 12542736 |
| 18 | 21262582 |
| 19 | 35359456 |
| 20 | 57767766 |
| 21 | 92832784 |
| 22 | 146908290 |
| 23 | 229169792 |
| 24 | 352721676 |
| 25 | 536076640 |
| 26 | 805132548 |
| 27 | 1195771840 |
| 28 | 1757278132 |