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A019245 as a simple table

n a(n)
3 0
4 0
5 4
6 6
7 4
8 16
9 60
10 88
11 224
12 650
13 1480
14 3372
15 9208
16 23126
17 56988
18 147778
19 387084
20 998552
21 2604672
22 6890844
23 18189156
24 48123802
25 128110692
26 341753792
27 912635960
28 2443846624
29 6557775236
30 17619900692
31 47420051376

[0,0,4,6,4,16,60,88,224,650,1480,3372,9208,23126,
 56988,147778,387084,998552,2604672,6890844,
 18189156,48123802,128110692,341753792,912635960,
 2443846624,6557775236,17619900692,47420051376]

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Last modified June 19 06:47 EDT 2019. Contains 324218 sequences. (Running on oeis4.)