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A129663 as a simple table

na(n)
01
11
28
326
41664
5106496
6370126848
77279690096640
84045738169062195200
9597704977138451388530688000
10111845949979901797334235660288000
111194765595895193218918930427630975811584000

[1,1,8,26,1664,106496,370126848,7279690096640,
 4045738169062195200,597704977138451388530688000,
 111845949979901797334235660288000,
 1194765595895193218918930427630975811584000]