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A286740 as a simple table

na(n)
01
12
21
314
41
562
60
7255
80
91023
100
114080
120
1316382
141
1565504
1631
17262112
1824
191048416
20135
214194120
22176
2316776975
24224
2567108630
26232
27268435220
28227
291073741596
30227
314294966300
32803
3317179868352
3455
3568719418312
3658375
37274877848304
3858624

[1,2,1,14,1,62,0,255,0,1023,0,4080,0,16382,1,
 65504,31,262112,24,1048416,135,4194120,176,
 16776975,224,67108630,232,268435220,227,
 1073741596,227,4294966300,803,17179868352,55,
 68719418312,58375,274877848304,58624]