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 A188023 Triangle by rows, A115361 * A127648 0

%I

%S 1,1,2,0,0,3,1,2,0,4,0,0,0,0,5,0,0,3,0,0,6,0,0,0,0,0,0,7,1,2,0,4,0,0,

%T 0,8,0,0,0,0,0,0,0,0,9,0,0,0,0,5,0,0,0,0,10,0,0,0,0,0,0,0,0,0,0,11,0,

%U 0,3,0,0,6,0,0,0,0,0,12

%N Triangle by rows, A115361 * A127648

%C row sums = A129527: (1, 3 3, 7, 5, 9, 7, 15,...)

%F Let A = the ruler function triangle A115361 as an infinite lower triangular matrix, and B = A127648 (a triangle with the natural numbers as the main diagonal and the rest zeros).

%F The triangle = A*B, as infinite lower triangular matrices.

%e First few rows of the triangle =

%e 1

%e 1, 2

%e 0, 0, 3

%e 1, 2, 0, 4

%e 0, 0, 0, 0, 5

%e 0, 0, 3, 0, 0, 6

%e 0, 0, 0, 0, 0, 0, 7

%e 1, 2, 0, 4, 0, 0, 0, 8

%e 0, 0, 0, 0, 0, 0, 0, 0, 9

%e 0, 0, 0, 0, 5, 0, 0, 0, 0, 10

%e 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 11

%e 0, 0, 3, 0, 0, 6, 0, 0, 0, 0, 0, 12

%e ...

%Y Cf. A115361, A127648, A129527

%K tabl,nonn

%O 1,3

%A _Gary W. Adamson_, Mar 19 2011

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Last modified April 9 08:41 EDT 2020. Contains 333344 sequences. (Running on oeis4.)