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A180438
as a simple table
n
a(n)
0
0
1
0
2
6
3
18
4
36
5
78
6
150
7
306
8
420
9
792
10
1338
11
2082
12
3228
13
4830
14
7050
15
9954
16
13920
17
18738
18
24666
19
32610
[0,0,6,18,36,78,150,306,420,792,1338,2082,3228, 4830,7050,9954,13920,18738,24666,32610]
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Last modified April 25 03:15 EDT 2024. Contains 371964 sequences. (Running on oeis4.)