Convolution of A023533 and A014306.

Terms

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