A141716 Column 1 of triangle A141715.

1, 4, 20, 136, 1292, 17400, 335404, 9317288, 374916236, 21939338488, 1872964421084, 233869019978312, 42804259804575932, 11504430006153224600, 4547687849230636111212, 2647655599871715881311656

Offset

0,2

Comments

Triangle A141715 equals the matrix square of triangle A141712.

Links

Table of n, a(n) for n=0..15.

Crossrefs

Cf. A141715; A141712.

Sequence in context: A290444 A270665 A330538 * A129102 A129099 A244756

Adjacent sequences: A141713 A141714 A141715 * A141717 A141718 A141719

Keyword

nonn

Author

Paul D. Hanna, Jul 01 2008

Status

approved