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 | 1 |
| 3 | 21 |
| 4 | 12 |
| 5 | 1 |
| 6 | 208 |
| 7 | 156 |
| 8 | 21 |
| 9 | 1 |
| 10 | 2637 |
| 11 | 2350 |
| 12 | 399 |
| 13 | 30 |
| 14 | 1 |
| 15 | 40731 |
| 16 | 41034 |
| 17 | 8029 |
| 18 | 750 |
| 19 | 39 |
| 20 | 1 |
| 21 | 742620 |
| 22 | 821562 |
| 23 | 177198 |
| 24 | 18865 |
| 25 | 1209 |
| 26 | 48 |
| 27 | 1 |
| 28 | 15624420 |
| 29 | 18631332 |
| 30 | 4317936 |
| 31 | 502335 |
| 32 | 36478 |
| 33 | 1776 |
| 34 | 57 |
| 35 | 1 |
| 36 | 372892266 |
| 37 | 473187270 |
| 38 | 115949841 |
| 39 | 14390880 |
| 40 | 1136811 |