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 A154109 Convolution triangle by rows, A004736 * (A154108 * 0^n-k)); row sums = Bell numbers. 2

%I

%S 1,2,0,3,0,2,4,0,4,7,5,0,6,14,27,6,0,8,21,54,114,7,0,10,28,81,228,523,

%T 8,0,12,35,108,342,1046,2589,9,0,14,42,135,456,1569,5178,13744,10,0,

%U 16,49,162,570,2092,7767,27488,77821

%N Convolution triangle by rows, A004736 * (A154108 * 0^n-k)); row sums = Bell numbers.

%C Row sums = Bell numbers, A000110 starting (1, 2, 5, 15, 52, 203, 877,...).

%F A004736 * (A154108 * 0^(n-k)); where A004736 = an infinite lower triangular

%F matrix with (1,2,3,...) in every column and (A154108 * 0^(n-k)) = a matrix

%F with A154108 (1, 0, 2, 7, 27, 114, 523, 2589...) as the main diagonal

%F and the rest zeros.

%e First few rows of the triangle =

%e 1;

%e 2, 0;

%e 3, 0, 2;

%e 4, 0, 4, 7;

%e 5, 0, 6, 14, 27;

%e 6, 0, 8, 21, 54, 114;

%e 7, 0, 10, 28, 81, 228, 523;

%e 8, 0, 12, 35, 108, 342, 1046, 2589;

%e 9, 0, 14, 42, 135, 456, 1569, 5178, 13744;

%e 10, 0, 16, 49, 162, 570, 2092, 7767, 27488, 77821;

%e ...

%e Row 5 = (5, 0, 6, 14, 27), sum = A000110(5) = 52 = termwise products of

%e (5, 4, 3, 2, 1) and (1, 0, 2, 7, 27).

%Y Cf. A154108, A000110

%K nonn,tabl

%O 1,2

%A _Gary W. Adamson_, Jan 04 2009

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Last modified September 28 09:08 EDT 2021. Contains 347714 sequences. (Running on oeis4.)