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A272319 as a simple table

na(n)
01
15
228
3136
4608
52720
611676
748328
8195532
9784156
103140672
1112574272
1250310244
13201283712
14805242016
153221200260

[1,5,28,136,608,2720,11676,48328,195532,784156,
 3140672,12574272,50310244,201283712,805242016,
 3221200260]