A130583 Column 3 of triangle A130580.

1, 1, 4, 10, 26, 71, 210, 673, 2328, 8649, 34341, 145043, 648895, 3063357, 15208948, 79172266, 430976971, 2447365652, 14466697028, 88841985950, 565817585424, 3731151186118, 25437569103196, 179054298041232, 1299648967295934

Offset

0,3

Links

Table of n, a(n) for n=0..24.

Crossrefs

Cf. A130580 (triangle); other columns: A130581, A130582.

Sequence in context: A200464 A099234 A087222 * A240048 A105999 A192210

Adjacent sequences: A130580 A130581 A130582 * A130584 A130585 A130586

Keyword

nonn

Author

Paul D. Hanna, Jun 05 2007

Status

approved