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A027931 T(n,2n-8), T given by A027926. 0
1, 2, 5, 13, 34, 88, 221, 530, 1204, 2587, 5270, 10220, 18955, 33775, 58060, 96647, 156299, 246280, 379051, 571103, 843944, 1225258, 1750255, 2463232, 3419366, 4686761, 6348772, 8506630, 11282393, 14822249, 19300198, 24922141 (list; graph; refs; listen; history; internal format)
OFFSET

4,2

FORMULA

a(n)=sum(binomial(n-k, 8-2k), k=0..4). - Len Smiley (smiley(AT)math.uaa.alaska.edu), Oct 20 2001

CROSSREFS

Sequence in context: A104589 A154101 A122024 * A103142 A112844 A027933

Adjacent sequences:  A027928 A027929 A027930 * A027932 A027933 A027934

KEYWORD

nonn

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

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Last modified February 14 23:04 EST 2012. Contains 205686 sequences.