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A158900 as a simple table

na(n)
01
11
24
320
4116
5756
65448
743032
8370704
93472656
1035303424
11388786176
124628774016
1359431077504
14820503839232
1512140411779584
16191844739736064
173226219598338560
1857540789020021760
191084906603389864960

[1,1,4,20,116,756,5448,43032,370704,3472656,
 35303424,388786176,4628774016,59431077504,
 820503839232,12140411779584,191844739736064,
 3226219598338560,57540789020021760,
 1084906603389864960]