Number of k for which n does not divide Stirling_2 subset numbers S(n, k).

Terms

a(0) =1a(1) =0a(2) =2a(3) =2a(4) =4a(5) =2a(6) =5a(7) =2a(8) =8a(9) =7a(10) =7a(11) =2a(12) =10a(13) =2a(14) =9a(15) =10a(16) =16a(17) =2a(18) =16a(19) =2a(20) =16a(21) =11a(22) =13a(23) =2a(24) =20a(25) =15a(26) =13a(27) =22a(28) =20a(29) =2