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A222323 as a simple table

n a(n)
1 0
2 0
3 4
4 19
5 0
6 84
7 212
8 1366
9 1302
10 11152
11 21206
12 132937
13 213292
14 1337380
15 2647514
16 15028233
17 29622012
18 163019148
19 347100284
20 1830194472
21 3971385578
22 20474549872
23 45912542370
24 231923364114
25 527948983676
26 2633446191848
27 6087316332422

[0,0,4,19,0,84,212,1366,1302,11152,21206,132937,
 213292,1337380,2647514,15028233,29622012,
 163019148,347100284,1830194472,3971385578,
 20474549872,45912542370,231923364114,527948983676,
 2633446191848,6087316332422]

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Last modified January 24 00:05 EST 2022. Contains 350515 sequences. (Running on oeis4.)