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A136783 as a simple table

na(n)
11
24
320
4112
5660
63976
724180
8147648
9903140
105528504
1133853220
12207325392
131269787060
147777149416
1547633751380
16291750220768
171786933908740
1810944758154264
1967035370422020
20410583912229872
212514779283989460
2215402734618128456
2394339983758166580

[1,4,20,112,660,3976,24180,147648,903140,5528504,
 33853220,207325392,1269787060,7777149416,
 47633751380,291750220768,1786933908740,
 10944758154264,67035370422020,410583912229872,
 2514779283989460,15402734618128456,
 94339983758166580]