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A137587 Triangle read by rows: A051731 * A026794. 2

%I

%S 1,2,1,3,0,1,5,2,0,1,6,1,0,0,1,11,3,2,0,0,1,12,2,1,0,0,0,1,20,6,1,2,0,

%T 0,0,1,25,4,3,1,0,0,0,0,1,37,9,2,1,2,0,0,0,0,1,43,8,3,1,1,0,0,0,0,0,1,

%U 70,16,6,3,1,2,0,0,0,0,0,1

%N Triangle read by rows: A051731 * A026794.

%C That is, regard A051731 and A026794 as lower triangular square matrices and multiply them, then take the lower triangle of the product,

%C Left column = A083710 starting (1, 2, 3, 5, 6, 11, 12,...). Row sums = A047968.

%F Inverse mobius transform of the partition triangle, A026794

%e First few rows of the triangle are:

%e .1;

%e .2, 1;

%e .3, 0, 1;

%e .5, 2, 0, 1;

%e .6, 1, 0, 0, 1;

%e .11, 3, 2, 0, 0, 1;

%e .12, 2, 1, 0, 0, 0, 1;

%e .20, 6, 1, 2, 0, 0, 0, 1;

%e .25, 4, 3, 1, 0, 0, 0, 0, 1;

%e ....

%Y Cf. A026794, A051731, A083710, A047968.

%K nonn,tabl

%O 1,2

%A _Gary W. Adamson_, Jan 27 2008

%E Typo in 9th row corrected by _M. F. Hasler_, Jun 08 2009

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Last modified June 16 07:14 EDT 2019. Contains 324145 sequences. (Running on oeis4.)