Expansion of (A(x)^2+A(x^2))/2 where A(x) = A001006(x)-1.

Terms

a(0) =0a(1) =0a(2) =1a(3) =2a(4) =7a(5) =17a(6) =49a(7) =129a(8) =358a(9) =970a(10) =2679a(11) =7364a(12) =20414a(13) =56634a(14) =157877a(15) =441084a(16) =1236496a(17) =3474672a(18) =9790403a(19) =27648486a(20) =78256907a(21) =221951037a(22) =630723367a(23) =1795576937a(24) =5120487946a(25) =14625574662a(26) =41837955145a(27) =119851980508a(28) =343798121799a(29) =987445317761