A134444 - OEIS

%I #6 Mar 25 2022 00:33:49

%S 1,1,1,3,1,1,3,3,1,1,5,3,3,1,1,5,5,3,3,1,1,7,5,5,3,3,1,1,7,7,5,5,3,3,

%T 1,1,9,7,7,5,5,3,3,1,1,9,9,7,7,5,5,3,3,1,1

%N (A000012 * A128174 + A128174 * A000012) - A000012.

%C Row sums = A000982: (1, 2, 5, 8, 13, 18, 25, ...).

%F (A000012 * A128174 + A128174 * A000012) - A000012, as infinite lower triangular matrices. Triangle read by rows, n-th row = n terms of odd numbers repeated, starting from the right.

%e First few rows of the triangle:

%e   1;

%e   1, 1;

%e   3, 1, 1;

%e   3, 3, 1, 1;

%e   5, 3, 3, 1, 1;

%e   5, 5, 3, 3, 1, 1;

%e   ...

%Y Cf. A128174, A000012, A000982.

%K nonn,tabl

%O 0,4

%A _Gary W. Adamson_, Oct 25 2007