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A113440 First row of A113439. 0
1, 2, 8, 34, 146, 627, 2689, 11521, 49337, 211233, 904306, 3871305, 16572812, 70947073, 303719624, 1300203634, 5566087073, 23828058969, 102006385362, 436682772844, 1869410868456, 8002827727921, 34259590954322 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

FORMULA

a(n) = 9a(n-1)-28a(n-2)+38a(n-3)-20a(n-4)+a(n-5)

g.f.: -(1-7*x+18*x^2-20*x^3+8*x^4)/(-1+9*x-28*x^2+38*x^3-20*x^4+x^5)

CROSSREFS

Cf. a(n)=A113439(4n).

Sequence in context: A117616 A192402 A014445 * A034999 A067336 A151829

Adjacent sequences:  A113437 A113438 A113439 * A113441 A113442 A113443

KEYWORD

nonn

AUTHOR

Floor van Lamoen (fvlamoen(AT)hotmail.com), Nov 04 2005

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Last modified February 16 01:31 EST 2012. Contains 205860 sequences.