Row sums of triangle A105537, which equals the matrix square of triangle A105535.

Terms

a(0) =1a(1) =3a(2) =9a(3) =17a(4) =61a(5) =138a(6) =238a(7) =634a(8) =1421a(9) =2707a(10) =4487a(11) =9709a(12) =27875a(13) =82827a(14) =219133a(15) =524502a(16) =1262352a(17) =3276409a(18) =8827139a(19) =22596514a(20) =54006726a(21) =122265827a(22) =275484693a(23) =658076339a(24) =1654581392a(25) =4100759772a(26) =9761051499a(27) =22296252002a(28) =49175830726