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A030055 C(2n+1,n-5). 4
1, 13, 105, 680, 3876, 20349, 100947, 480700, 2220075, 10015005, 44352165, 193536720, 834451800, 3562467300, 15084504396, 63432274896, 265182149218, 1103068603890, 4568648125690, 18851684897584 (list; graph; refs; listen; history; internal format)
OFFSET

5,2

LINKS

Milan Janjic, Two Enumerative Functions

CROSSREFS

Diagonal 12 of triangle A100257.

Sequence in context: A052065 A041316 A080422 * A155636 A055902 A132261

Adjacent sequences:  A030052 A030053 A030054 * A030056 A030057 A030058

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified February 17 13:28 EST 2012. Contains 206031 sequences.