A152736 - OEIS

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A152736

Triangle read by rows: M*Q, where M = an infinite lower triangular matrix with A140456 in every column: (1, 1, 1, 3, 7, 23, 71, ...) and Q = a matrix with A000085 as the main diagonal the rest zeros.

1, 1, 1, 1, 1, 2, 3, 1, 2, 4, 7, 3, 2, 4, 10, 23, 7, 6, 4, 10, 26, 71, 23, 14, 12, 10, 26, 76, 255, 71, 46, 28, 30, 26, 76, 232, 911, 255, 142, 92, 70, 78, 76, 232, 764, 3535, 911, 510, 284, 230, 182, 228, 232, 764, 2620

(list; table; graph; refs; listen; history; text; internal format)

OFFSET

1,6

COMMENTS

An eigentriangle.

Row sums = A000085 starting with offset 1.

Sum of n-th row terms = rightmost term of next row.

LINKS

Table of n, a(n) for n=1..55.

EXAMPLE

First few rows of the triangle:

1, 1;