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 | 1 |
2 | 3 |
3 | 13 |
4 | 71 |
5 | 463 |
6 | 3497 |
7 | 29975 |
8 | 287265 |
9 | 3042545 |
10 | 35284315 |
11 | 444617525 |
12 | 6048575335 |
13 | 88347242335 |
14 | 1378930649745 |
15 | 22903345844335 |
16 | 403342641729665 |
17 | 7506843094993825 |
18 | 147226845692229875 |
19 | 3034786640911840925 |
20 | 65592491119118514375 |