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A019201 as a simple table

n a(n)
3 0
4 4
5 0
6 4
7 0
8 16
9 4
10 144
11 76
12 608
13 720
14 2668
15 5420
16 15760
17 37408
18 95392
19 239288
20 608356
21 1510488
22 4016968
23 9825508
24 26495504
25 65169376
26 176596032
27 438256112
28 1187118732
29 2985085996
30 8026046992
31 20498428264
32 54743948944

[0,4,0,4,0,16,4,144,76,608,720,2668,5420,15760,
 37408,95392,239288,608356,1510488,4016968,9825508,
 26495504,65169376,176596032,438256112,1187118732,
 2985085996,8026046992,20498428264,54743948944]

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Last modified April 24 08:56 EDT 2024. Contains 371934 sequences. (Running on oeis4.)