A126153 - OEIS

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A126153

Secondary diagonal of symmetric triangle A126150: a(n) = A126150(n+1,n).

1, 24, 636, 26304, 1650456, 147705984, 17913816576, 2830553662464, 565108879101696, 139114514096953344, 41397845529582959616, 14649251145209922945024, 6079754611331559564097536

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

OFFSET

0,2

LINKS

Table of n, a(n) for n=0..12.

FORMULA

a(n) = A126152(n+1) - 3*A126152(n), where A126152 is the main diagonal of triangle A126150.

CROSSREFS

Cf. A126150; A126151 (column 0), A126152 (diagonal).

Sequence in context: A097192 A182611 A331322 * A002553 A006201 A118051

Adjacent sequences: A126150 A126151 A126152 * A126154 A126155 A126156

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Dec 19 2006

STATUS

approved