%I #5 Aug 27 2023 08:44:04
%S 1,5,1,9,1,1,19,5,1,1,23,5,1,1,1,39,9,5,1,1,1,43,9,5,1,1,1,1,63,19,5,
%T 5,1,1,1,1,73,19,9,5,1,1,1,1,1,89,23,9,5,5,1,1,1,1,1,93,23,9,5,5,1,1,
%U 1,1,1,1
%N A000012 * A051731^4.
%C Row sums = A061203: (1, 6, 11, 26, 31, 56,...).
%C Left column = A061202: (1, 5, 9, 19, 23, 39,...).
%F A000012 * A051731^4 as infinite lower triangular matrices, where A051731 = the inverse Mobius transform and A000012 = an infinite lower triangular matrix with all 1's.
%e First few rows of the triangle are:
%e 1;
%e 5, 1;
%e 9, 1, 1;
%e 19, 5, 1, 1;
%e 23, 5, 1, 1, 1;
%e 39, 9, 5, 1, 1, 1;
%e 43, 9, 5, 1, 1, 1, 1;
%e 63, 19, 5, 5, 1, 1, 1, 1;
%e ...
%Y Cf. A051731, A061203, A061202.
%K nonn,tabl
%O 1,2
%A _Gary W. Adamson_, May 24 2008
%E a(60) split into 5,1 by _Georg Fischer_, Aug 27 2023
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