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 | 76 |
| 3 | 300 |
| 4 | 930 |
| 5 | 2442 |
| 6 | 5676 |
| 7 | 12012 |
| 8 | 23595 |
| 9 | 43615 |
| 10 | 76648 |
| 11 | 129064 |
| 12 | 209508 |
| 13 | 329460 |
| 14 | 503880 |
| 15 | 751944 |
| 16 | 1097877 |
| 17 | 1571889 |
| 18 | 2211220 |
| 19 | 3061300 |
| 20 | 4177030 |
| 21 | 5624190 |
| 22 | 7480980 |
| 23 | 9839700 |
| 24 | 12808575 |
| 25 | 16513731 |
| 26 | 21101328 |
| 27 | 26739856 |
| 28 | 33622600 |
| 29 | 41970280 |