Number of partitions of n such that 2*(greatest part) = (number of parts).

Terms

a(0) =0a(1) =1a(2) =0a(3) =0a(4) =1a(5) =1a(6) =1a(7) =2a(8) =1a(9) =2a(10) =3a(11) =4a(12) =5a(13) =7a(14) =7a(15) =9a(16) =12a(17) =15a(18) =17a(19) =23a(20) =27a(21) =34a(22) =42a(23) =50a(24) =60a(25) =75a(26) =87a(27) =106a(28) =128a(29) =154