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) |
|---|---|
| 1 | 1 |
| 2 | 6 |
| 3 | 13 |
| 4 | 112 |
| 5 | 51 |
| 6 | 24 |
| 7 | 15088 |
| 8 | 12284 |
| 9 | 88460 |
| 10 | 1204 |
| 11 | 459 |
| 12 | 31824 |
| 13 | 93210 |
| 14 | 1864254 |
| 15 | 531648 |
| 16 | 456036 |
| 17 | 8299090 |
| 18 | 28574910 |
| 19 | 1813560 |
| 20 | 32552820 |
| 21 | 33166008 |
| 22 | 133585180 |
| 23 | 2503410 |
| 24 | 214098720 |
| 25 | 3183870690 |
| 26 | 7411133309730 |
| 27 | 4852769490690 |
| 28 | 2294509753536 |
| 29 | 175964053944 |
| 30 | 3336533898768 |