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A287079 as a simple table

na(n)
01
12
20
312
41
556
60
7240
87
9992
101
114032
1224
1316264
141
1565280
1696
17261647
180
191047591
20384
214192387
220
2316773121
241536
2567100672
260
27268420035
286144
291073711489
300
314294901760
3224576
3317179740163
340
3568719222785
3698304
37274877415424
380
391099510579200

[1,2,0,12,1,56,0,240,7,992,1,4032,24,16264,1,
 65280,96,261647,0,1047591,384,4192387,0,16773121,
 1536,67100672,0,268420035,6144,1073711489,0,
 4294901760,24576,17179740163,0,68719222785,98304,
 274877415424,0,1099510579200]