a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = A023531, t = A014306.

Terms

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