Number of partitions of 4n into distinct parts with equal sums of odd and even parts.

Terms

a(0) =1a(1) =0a(2) =1a(3) =2a(4) =4a(5) =6a(6) =12a(7) =15a(8) =30a(9) =40a(10) =70a(11) =96a(12) =165a(13) =216a(14) =352a(15) =486a(16) =736a(17) =988a(18) =1518a(19) =1998a(20) =2944a(21) =3952a(22) =5607a(23) =7488a(24) =10614a(25) =13916a(26) =19305a(27) =25536a(28) =34854a(29) =45568