cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A125170 Binomial transform of an infinite lower triangular matrix with (1,1,2,4,8,...) in every column and the rest zeros. Let the left column = A007051, then for k > 1, T(n,k) = (n-1,k) + (n-1,k-1).

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%I A125170 #12 Feb 14 2022 03:54:56
%S A125170 1,2,1,5,3,1,14,8,4,1,41,22,12,5,1,122,63,34,17,6,1,365,185,97,51,23,
%T A125170 7,1,1094,550,282,148,74,30,8,1,3281,1644,832,430,222,104,38,9,1
%N A125170 Binomial transform of an infinite lower triangular matrix with (1,1,2,4,8,...) in every column and the rest zeros. Let the left column = A007051, then for k > 1, T(n,k) = (n-1,k) + (n-1,k-1).
%e A125170 (5,3) = 34 = 12 + 22 = (4,3) + (4,2).
%e A125170 First few rows of the triangle:
%e A125170     1;
%e A125170     2,  1;
%e A125170     5,  3,  1;
%e A125170    14,  8,  4,  1;
%e A125170    41, 22, 12,  5, 1;
%e A125170   122, 63, 34, 17, 6, 1;
%e A125170   ...
%Y A125170 Cf. A000244 (row sums), A007051 (left border).
%K A125170 nonn,tabl
%O A125170 0,2
%A A125170 _Gary W. Adamson_, Nov 22 2006
%E A125170 Edited by _N. J. A. Sloane_, Oct 07 200