Number of integer partitions of n that cannot be partitioned into a set of sets.

Terms

a(0) =0a(1) =0a(2) =1a(3) =1a(4) =2a(5) =2a(6) =5a(7) =6a(8) =9a(9) =13a(10) =17a(11) =23a(12) =33a(13) =42a(14) =58a(15) =76a(16) =97a(17) =126a(18) =168a(19) =207a(20) =266a(21) =343a(22) =428a(23) =534a(24) =675a(25) =832a(26) =1039a(27) =1279a(28) =1575a(29) =1933