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 | 2 |
2 | 9 |
3 | 72 |
4 | 830 |
5 | 12420 |
6 | 228060 |
7 | 4959360 |
8 | 124589304 |
9 | 3550050000 |
10 | 113116311000 |
11 | 3985174226880 |
12 | 153815533185600 |
13 | 6454433029524480 |
14 | 292557975636326400 |
15 | 14244829479956275200 |
16 | 741502151945703308160 |
17 | 41092028680670274827520 |
18 | 2415394879269218890243200 |