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A019193 as a simple table

n a(n)
3 0
4 0
5 2
6 8
7 4
8 20
9 50
10 124
11 234
12 708
13 1548
14 3862
15 9234
16 24723
17 57884
18 151618
19 379592
20 998060
21 2518128
22 6681575
23 17316668
24 46002619
25 120672278
26 322875444
27 855590998
28 2294409103
29 6123605446
30 16472081266
31 44156377366

[0,0,2,8,4,20,50,124,234,708,1548,3862,9234,24723,
 57884,151618,379592,998060,2518128,6681575,
 17316668,46002619,120672278,322875444,855590998,
 2294409103,6123605446,16472081266,44156377366]

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Last modified January 22 01:28 EST 2022. Contains 350481 sequences. (Running on oeis4.)