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 | 20 |
3 | 90 |
4 | 630 |
5 | 1260 |
6 | 3780 |
7 | 21420 |
8 | 41580 |
9 | 128520 |
10 | 270270 |
11 | 554400 |
12 | 706860 |
13 | 1413720 |
14 | 2042040 |
15 | 4324320 |
16 | 4084080 |
17 | 9189180 |
18 | 6126120 |
19 | 43825320 |
20 | 12252240 |
21 | 18378360 |
22 | 82162080 |
23 | 36756720 |
24 | 85765680 |
25 | 73513440 |
26 | 183783600 |
27 | 306306000 |
28 | 257297040 |
29 | 563603040 |
30 | 514594080 |