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A019195 as a simple table

n a(n)
3 0
4 0
5 4
6 6
7 4
8 22
9 50
10 118
11 186
12 704
13 1420
14 3678
15 8470
16 23668
17 54792
18 146181
19 362476
20 967161
21 2432178
22 6515652
23 16829286
24 44983125
25 117818862
26 316461687
27 837468916
28 2250992464
29 6002841492
30 16168909200
31 43313559104

[0,0,4,6,4,22,50,118,186,704,1420,3678,8470,23668,
 54792,146181,362476,967161,2432178,6515652,
 16829286,44983125,117818862,316461687,837468916,
 2250992464,6002841492,16168909200,43313559104]

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Last modified May 17 10:16 EDT 2022. Contains 353745 sequences. (Running on oeis4.)