Number of partitions of n with at least 1 odd and 1 even part.

Terms

a(0) =0a(1) =0a(2) =0a(3) =1a(4) =1a(5) =4a(6) =4a(7) =10a(8) =11a(9) =22a(10) =25a(11) =44a(12) =51a(13) =83a(14) =98a(15) =149a(16) =177a(17) =259a(18) =309a(19) =436a(20) =521a(21) =716a(22) =857a(23) =1151a(24) =1376a(25) =1816a(26) =2170a(27) =2818a(28) =3361a(29) =4309