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A249489 as a simple table

na(n)
01
10
29
30
412070
50
6126447741
70
85100496997940
90
10562605048135059545
110
12138523311740417986721274
130
1466543520389763227261554370645
150
1656664734898911130799849838608991176
170
1879610326854782816434044397510470501877041

[1,0,9,0,12070,0,126447741,0,5100496997940,0,
 562605048135059545,0,138523311740417986721274,0,
 66543520389763227261554370645,0,
 56664734898911130799849838608991176,0,
 79610326854782816434044397510470501877041]