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 | 0 |
2 | 2 |
3 | 6 |
4 | 28 |
5 | 280 |
6 | 3486 |
7 | 50624 |
8 | 877080 |
9 | 17677440 |
10 | 404537050 |
11 | 10360548352 |
12 | 293676213876 |
13 | 9126971869184 |
14 | 308568877413174 |
15 | 11274243944693760 |
16 | 442681525701106096 |
17 | 18588860836606935040 |
18 | 831243363178769061426 |
19 | 39436124829328468606976 |
20 | 1978382154057910059275340 |