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A017930 as a simple table

na(n)
01
13
28
323
464
5182
6512
71449
84096
911586
1032768
1192682
12262144
13741456
142097152
155931642
1616777216
1747453133
18134217728
19379625063
201073741824
213037000500
228589934592
2324296004000
2468719476736

[1,3,8,23,64,182,512,1449,4096,11586,32768,92682,
 262144,741456,2097152,5931642,16777216,47453133,
 134217728,379625063,1073741824,3037000500,
 8589934592,24296004000,68719476736]