Self-convolution of A265264.

Terms

a(0) =1a(1) =2a(2) =5a(3) =12a(4) =32a(5) =76a(6) =192a(7) =496a(8) =1332a(9) =3184a(10) =7920a(11) =19776a(12) =50432a(13) =128384a(14) =332288a(15) =874368a(16) =2324480a(17) =5622528a(18) =14009856a(19) =34833920a(20) =87722240a(21) =218775040a(22) =551715840a(23) =1398160384a(24) =3558288384a(25) =9005299712a(26) =22949810176a(27) =58833842176a(28) =151438327808a(29) =393635946496