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A027913 as a simple table

na(n)
01
11
22
33
410
515
650
777
8266
9414
101452
112277
128074
1312727
1445474
1571955
16258570
17410346
181481108
192355962
208533660
2113599915
2249402850
2378855339
24287134346
25458917850
261674425300
272679183405
289792273690
2915683407785

[1,1,2,3,10,15,50,77,266,414,1452,2277,8074,12727,
 45474,71955,258570,410346,1481108,2355962,8533660,
 13599915,49402850,78855339,287134346,458917850,
 1674425300,2679183405,9792273690,15683407785]