Self-convolution cube of A090845.

Terms

a(0) =1a(1) =3a(2) =9a(3) =22a(4) =51a(5) =114a(6) =230a(7) =468a(8) =885a(9) =1674a(10) =3045a(11) =5418a(12) =9560a(13) =16341a(14) =27912a(15) =46383a(16) =76794a(17) =125205a(18) =201580a(19) =322980a(20) =508710a(21) =800495a(22) =1241190a(23) =1916682a(24) =2935492a(25) =4456617a(26) =6747393a(27) =10101532a(28) =15105042a(29) =22378362