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A272602 as a simple table

na(n)
01
11
22
34
410
526
6316
71912
814204
983260
10513496
112918576
1243605112
13442060984
145396258960
1551589877536
16502620599056
174387660231952
1877691034349344
191065687761143360
2017601265218632096
21230878891157853856
223055183837594858432
2335865234134641395584
24155845649043266241280960

[1,1,2,4,10,26,316,1912,14204,83260,513496,
 2918576,43605112,442060984,5396258960,51589877536,
 502620599056,4387660231952,77691034349344,
 1065687761143360,17601265218632096,
 230878891157853856,3055183837594858432,
 35865234134641395584,155845649043266241280960]