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A056096 as a simple table

na(n)
31
44
517
680
7403
82128
911628
1065208
11373175
122170740
1312797265
1476292736
15459162452
162786017120
1717024247304
18104673837384
19647113502847
204020062732140

[1,4,17,80,403,2128,11628,65208,373175,2170740,
 12797265,76292736,459162452,2786017120,
 17024247304,104673837384,647113502847,
 4020062732140]