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A156928 G.f. of the z^1 coefficients of the FP1 in the second column of the A156921 matrix 4
1, 7, 28, 86, 227, 545, 1230, 2664, 5613, 11611, 23728, 48106, 97031, 195077, 391394, 784284, 1570353, 3142815, 6288100, 12579070, 25161451, 50326697, 100657718, 201320336, 402646197, 805298595 (list; graph; refs; listen; history; internal format)
OFFSET

2,2

FORMULA

a(n)=5*a(n-1)-9*a(n-2)+7*a(n-3)-2*a(n-4)+2

a(n)=6*a(n-1)-14*a(n-2)+16*a(n-3)-9*a(n-4)+2*a(n-5)

a(n)= -1/3*n^3-3/2*n^2-25/6*n-6+6*2^n

G.f.: GF3(z;m=1) = z^2*(1+z)/((1-z)^4*(1-2*z))

CROSSREFS

Cf. A156927

Equals second column of A156921

Other columns A156929, A156930, A156931

Sequence in context: A145135 A144900 A054469 * A117473 A163037 A022572

Adjacent sequences:  A156925 A156926 A156927 * A156929 A156930 A156931

KEYWORD

easy,nonn

AUTHOR

Johannes W. Meijer (meijgia(AT)hotmail.com), Feb 20 2009

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Last modified February 15 09:26 EST 2012. Contains 205753 sequences.