Triangle, read by rows, where T(n,k) = T(n-1,k-1) + 2*T(n,k-1) when k > 0, else T(n,0) = T(n-1,n-1) when n > 0, with T(0,0) = 1.

A376177

Triangle, read by rows, where T(n,k) = T(n-1,k-1) + 2*T(n,k-1) when k > 0, else T(n,0) = T(n-1,n-1) when n > 0, with T(0,0) = 1.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =3a(4) =7a(5) =17a(6) =17a(7) =37a(8) =81a(9) =179a(10) =179a(11) =375a(12) =787a(13) =1655a(14) =3489a(15) =3489a(16) =7157a(17) =14689a(18) =30165a(19) =61985a(20) =127459a(21) =127459a(22) =258407a(23) =523971a(24) =1062631a(25) =2155427a(26) =4372839a(27) =8873137a(28) =8873137a(29) =17873733

External references