Sum of proper divisors minus the number of proper divisors of pentagonal number A000326(n).

Terms

a(0) =0a(1) =0a(2) =11a(3) =11a(4) =10a(5) =18a(6) =67a(7) =71a(8) =60a(9) =32a(10) =187a(11) =351a(12) =30a(13) =46a(14) =519a(15) =337a(16) =128a(17) =220a(18) =577a(19) =483a(20) =366a(21) =286a(22) =507a(23) =1153a(24) =248a(25) =336a(26) =2489a(27) =847a(28) =70a(29) =818