Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 30 |
5 | 260 |
6 | 2358 |
7 | 20430 |
8 | 176774 |
9 | 1527918 |
10 | 13204026 |
11 | 114099558 |
12 | 985963206 |
13 | 8519922122 |
14 | 73622499446 |
15 | 636187953758 |
16 | 5497437822074 |
17 | 47504550336526 |
18 | 410497104019406 |
19 | 3547194348471034 |
20 | 30652074338152030 |
21 | 264871210587660230 |
[0,0,0,30,260,2358,20430,176774,1527918,13204026, 114099558,985963206,8519922122,73622499446, 636187953758,5497437822074,47504550336526, 410497104019406,3547194348471034, 30652074338152030,264871210587660230] |