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A140582 Triangle read by rows, A000012 * A140581. 1

%I #4 Mar 03 2013 14:29:00

%S 1,2,1,4,1,1,4,2,1,1,8,2,1,1,1,5,4,2,1,1,1,11,4,2,1,1,1,1,11,4,2,2,1,

%T 1,1,1,11,4,4,2,1,1,1,1,1,6,8,4,2,2,1,1,1,1,1,16,8,4,2,1,1,1,1,1,1,16,

%U 5,4,4,2,2,1,1,1,1,1,1,28,5,4,4,2,2,1,1,1,1,1,1,1

%N Triangle read by rows, A000012 * A140581.

%C Row sums = A072107: (1, 3, 6, 8, 13, 14,...).

%F Triangle read by rows, A000012 * A140581; where A000012 = the infinite lower triangular matrix with all 1's: [1; 1,1; 1,1,1;...].

%e First few rows of the triangle are:

%e 1;

%e 2, 1;

%e 4, 1, 1;

%e 4, 2, 1, 1;

%e 8, 2, 1, 1, 1;

%e 5, 4, 2, 1, 1, 1;

%e 11, 4, 2, 1, 1, 1, 1;

%e 11, 4, 2, 2, 1, 1, 1, 1;

%e 11, 4, 4, 2, 1, 1, 1, 1, 1;

%e 6, 8, 4, 2, 2, 1, 1, 1, 1, 1;

%e ...

%Y Cf. A140581, A072107.

%K nonn,tabl

%O 0,2

%A _Gary W. Adamson_ and _Mats Granvik_, May 17 2008

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Last modified April 23 08:19 EDT 2024. Contains 371905 sequences. (Running on oeis4.)