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A113442 Third row of A113439. 0
1, 4, 17, 72, 306, 1305, 5577, 23858, 102108, 437080, 1871065, 8009866, 34289712, 146792138, 628407994, 2690174883, 11516466985, 49301256865, 211055514017, 903515089697, 3867890010850, 16558188448465, 70884540117396 (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.: -(1-5*x+9*x^2-7*x^3+2*x^4)/(-1+9*x-28*x^2+38*x^3-20*x^4+x^5)

CROSSREFS

Cf. a(n)=A113439(4n+2).

Sequence in context: A022031 A001076 A122451 * A085732 A083330 A018902

Adjacent sequences:  A113439 A113440 A113441 * A113443 A113444 A113445

KEYWORD

nonn

AUTHOR

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

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