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A027776 (n+1)*C(n+1,16). 0
16, 289, 2754, 18411, 96900, 427329, 1641486, 5638611, 17651304, 51074375, 138105110, 352023165, 851809140, 1968053535, 4362680250, 9316746045, 19234572480, 38504502630, 74934688620, 142097513250, 263083395960 (list; graph; refs; listen; history; internal format)
OFFSET

0,1

FORMULA

Number of 18-subsequences of [ 1, n ] with just 1 contiguous pair; g.f. (16+x)/(1-x)^18

C(n+16, 16)*C(n+16, 1) - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jun 08 2005

CROSSREFS

Sequence in context: A189955 A038758 A182608 * A140770 A099279 A202878

Adjacent sequences:  A027773 A027774 A027775 * A027777 A027778 A027779

KEYWORD

nonn

AUTHOR

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

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Last modified February 15 14:57 EST 2012. Contains 205823 sequences.