A127778 - OEIS

A127778

Triangle T(n,k) = A002411(k) read by rows.

1, 1, 6, 1, 6, 18, 1, 6, 18, 40, 1, 6, 18, 40, 75, 1, 6, 18, 40, 75, 126, 1, 6, 18, 40, 75, 126, 196, 1, 6, 18, 40, 75, 126, 196, 288

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OFFSET

1,3

LINKS

FORMULA

Equals the matrix product A002260 * A127773 as infinite lower triangular matrices.

EXAMPLE

First few rows of the triangle are:

1, 6;

1, 6, 18;

1, 6, 18, 40;

1, 6, 18, 40, 75;

...

CROSSREFS

KEYWORD

nonn,easy,tabl

AUTHOR

STATUS

approved