Base 4 digital convolution sequence.

Terms

a(0) =1a(1) =1a(2) =2a(3) =6a(4) =2a(5) =8a(6) =18a(7) =62a(8) =36a(9) =160a(10) =392a(11) =1496a(12) =1176a(13) =5664a(14) =14856a(15) =61560a(16) =5664a(17) =20520a(18) =102600a(19) =313464a(20) =123120a(21) =539184a(22) =1514952a(23) =5207160a(24) =3569088a(25) =15498360a(26) =43342056a(27) =164591976a(28) =145524528a(29) =682642512