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A284861 as a simple table

na(n)
01
11
23
31
415
518
61
763
8216
9162
101
11255
121890
133564
141944
151
161023
1714760
1852650
1968040
2029160
211
224095
23109458
24659340
251516320
261487160
27524880
281
2916383
30790776
317578522
3227624240
3346539360
3436741600
3511022480
361
3765535
385633730
3982902204
40450057384
411158993360
421535798880
431014068160
44264539520

[1,1,3,1,15,18,1,63,216,162,1,255,1890,3564,1944,
 1,1023,14760,52650,68040,29160,1,4095,109458,
 659340,1516320,1487160,524880,1,16383,790776,
 7578522,27624240,46539360,36741600,11022480,1,
 65535,5633730,82902204,450057384,1158993360,
 1535798880,1014068160,264539520]