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A130583
Column 3 of triangle A130580.
3
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
CROSSREFS
Cf. A130580 (triangle); other columns: A130581, A130582.
Sequence in context: A200464 A099234 A087222 * A240048 A105999 A192210
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Jun 05 2007
STATUS
approved