Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
0 | 0 |
1 | 4 |
2 | 20 |
3 | 76 |
4 | 260 |
5 | 844 |
6 | 2660 |
7 | 8236 |
8 | 25220 |
9 | 76684 |
10 | 232100 |
11 | 700396 |
12 | 2109380 |
13 | 6344524 |
14 | 19066340 |
15 | 57264556 |
16 | 171924740 |
17 | 516036364 |
18 | 1548633380 |
19 | 4646948716 |
20 | 13942943300 |
21 | 41833024204 |
22 | 125507461220 |
23 | 376539160876 |
24 | 1129651037060 |
25 | 3389020220044 |
26 | 10167194877860 |
[0,4,20,76,260,844,2660,8236,25220,76684,232100, 700396,2109380,6344524,19066340,57264556, 171924740,516036364,1548633380,4646948716, 13942943300,41833024204,125507461220,376539160876, 1129651037060,3389020220044,10167194877860] |