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A239549 as a simple table

na(n)
00
11
28
376
4704
56544
660800
7564928
85249024
948771328
10453158912
114210527232
1239122124800
13363503325184
143377492099072
1531381976694784
16291585718747136
172709269470314496
1825173184387481600
19233896708743626752
202173251882598793216

[0,1,8,76,704,6544,60800,564928,5249024,48771328,
 453158912,4210527232,39122124800,363503325184,
 3377492099072,31381976694784,291585718747136,
 2709269470314496,25173184387481600,
 233896708743626752,2173251882598793216]