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

Offset: 0

Author

Paul D. Hanna, Dec 19 2006

Keywords

• nonn

Crossrefs

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

Formula

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