a(n) = n-th Rhonda number to base b = n-th composite number, cf. A002808.

Terms

a(0) =10206a(1) =1029a(2) =6622a(3) =44360a(4) =5439a(5) =4888a(6) =58404a(7) =20079a(8) =26296a(9) =36549a(10) =52059a(11) =61376a(12) =131427a(13) =29106a(14) =165504a(15) =137007a(16) =63525a(17) =61115a(18) =22784a(19) =135705a(20) =658896a(21) =563159a(22) =208369a(23) =115506a(24) =1078784a(25) =228436a(26) =152308a(27) =185571a(28) =539213a(29) =152532