Number of 2's in all partitions of 2n+1 that do not contain 1 as a part.

Terms

a(0) =0a(1) =0a(2) =1a(3) =3a(4) =7a(5) =15a(6) =29a(7) =53a(8) =94a(9) =160a(10) =265a(11) =430a(12) =683a(13) =1066a(14) =1640a(15) =2487a(16) =3725a(17) =5519a(18) =8092a(19) =11752a(20) =16922a(21) =24167a(22) =34254a(23) =48213a(24) =67409a(25) =93661a(26) =129378a(27) =177720a(28) =242841a(29) =330172