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 | 0 |
1 | 1 |
2 | 9 |
3 | 77 |
4 | 714 |
5 | 7374 |
6 | 85272 |
7 | 1102968 |
8 | 15908400 |
9 | 254866320 |
10 | 4516084800 |
11 | 88102382400 |
12 | 1883199024000 |
13 | 43885950595200 |
14 | 1109416142822400 |
15 | 30273281955302400 |
16 | 887493144729139200 |
17 | 27827941161784780800 |
18 | 929449073791558656000 |
19 | 32943696020637889536000 |
20 | 1234946945823695419392000 |