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A027804 14*(n+1)*C(n+4,8). 0
70, 756, 4410, 18480, 62370, 180180, 462462, 1081080, 2342340, 4764760, 9189180, 16930368, 29980860, 51279480, 85058820, 137287920, 216228474, 333125100, 503052550, 745945200, 1087836750, 1562340780, 2212405650 (list; graph; refs; listen; history; internal format)
OFFSET

0,1

FORMULA

Number of 13-subsequences of [ 1, n ] with just 4 contiguous pairs; g.f. 14*(5+4x)/(1-x)^10

C(n+5, 5)*C(n+8, 4) - Zerinvary Lajos (zlaja(AT)freemail.hu), May 10 2005

CROSSREFS

Sequence in context: A104475 A169712 A199829 * A177298 A006037 A002975

Adjacent sequences:  A027801 A027802 A027803 * A027805 A027806 A027807

KEYWORD

nonn

AUTHOR

thi ngoc dinh (via rkg(AT)cpsc.ucalgary.ca)

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Last modified February 17 10:05 EST 2012. Contains 206009 sequences.