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A180967 as a simple table

n a(n)
1 0
2 0
3 4
4 4
5 20
6 24
7 88
8 116
9 372
10 520
11 1544
12 2248
13 6344
14 9520
15 25904
16 39796
17 105332
18 164904
19 427048
20 679064
21 1727640
22 2783440
23 6977744
24 11368904
25 28146120
26 46307664
27 113416528
28 188202256
29 456637712
30 763506784

[0,0,4,4,20,24,88,116,372,520,1544,2248,6344,9520,
 25904,39796,105332,164904,427048,679064,1727640,
 2783440,6977744,11368904,28146120,46307664,
 113416528,188202256,456637712,763506784]

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Last modified May 4 06:34 EDT 2024. Contains 372230 sequences. (Running on oeis4.)