Number of partitions of n in which no part occurs just once.

Terms

a(0) =1a(1) =0a(2) =1a(3) =1a(4) =2a(5) =1a(6) =4a(7) =2a(8) =6a(9) =5a(10) =9a(11) =7a(12) =16a(13) =11a(14) =22a(15) =20a(16) =33a(17) =28a(18) =51a(19) =42a(20) =71a(21) =66a(22) =100a(23) =92a(24) =147a(25) =131a(26) =199a(27) =193a(28) =275a(29) =263