Number of partitions of n such that the (sum of all even parts) = floor(n/2).

Terms

a(0) =1a(1) =0a(2) =0a(3) =1a(4) =2a(5) =0a(6) =0a(7) =4a(8) =6a(9) =0a(10) =0a(11) =12a(12) =15a(13) =0a(14) =0a(15) =30a(16) =40a(17) =0a(18) =0a(19) =70a(20) =84a(21) =0a(22) =0a(23) =165a(24) =198a(25) =0a(26) =0a(27) =330a(28) =405a(29) =0