Self-convolution equals A113224.

Terms

a(0) =1a(1) =1a(2) =3a(3) =5a(4) =11a(5) =23a(6) =51a(7) =113a(8) =255a(9) =579a(10) =1325a(11) =3047a(12) =7039a(13) =16319a(14) =37951a(15) =88489a(16) =206799a(17) =484255a(18) =1135969a(19) =2668951a(20) =6279509a(21) =14793169a(22) =34889553a(23) =82372723a(24) =194664283a(25) =460436551a(26) =1089943229a(27) =2582033519a(28) =6120967411a(29) =14519686915