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 | 13 |
| 2 | 90 |
| 3 | 443 |
| 4 | 1741 |
| 5 | 5811 |
| 6 | 17109 |
| 7 | 45577 |
| 8 | 111852 |
| 9 | 256282 |
| 10 | 553866 |
| 11 | 1138110 |
| 12 | 2237924 |
| 13 | 4233126 |
| 14 | 7735923 |
| 15 | 13707967 |
| 16 | 23625303 |
| 17 | 39706809 |
| 18 | 65225654 |
| 19 | 104927954 |
| 20 | 165588279 |
| 21 | 256738054 |
| 22 | 391610309 |
| 23 | 588352779 |
| 24 | 871571154 |
| 25 | 1274275456 |
| 26 | 1840315206 |
| 27 | 2627403376 |
| 28 | 3710845242 |
| 29 | 5188106314 |
| 30 | 7184373674 |
| 31 | 9859287465 |
| 32 | 13415044111 |
| 33 | 18106100284 |
| 34 | 24250736849 |