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A026062 a(n) = (d(n)-r(n))/5, where d = A026060 and r is the periodic sequence with fundamental period (0,0,1,4,0). 1
9, 16, 25, 36, 51, 68, 88, 111, 137, 168, 202, 240, 282, 328, 380, 436, 497, 563, 634, 712, 795, 884, 979, 1080, 1189, 1304, 1426, 1555, 1691, 1836, 1988, 2148, 2316, 2492, 2678, 2872, 3075, 3287, 3508, 3740, 3981, 4232, 4493, 4764, 5047, 5340, 5644, 5959, 6285, 6624, 6974, 7336, 7710, 8096 (list; graph; refs; listen; history; text; internal format)
OFFSET

5,1

LINKS

Table of n, a(n) for n=5..58.

Index entries for linear recurrences with constant coefficients, signature (3,-3,1,0,1,-3,3,-1).

FORMULA

a(n)=(n + 5)*(n^2 + 25*n + 54)/30 - 1/5*(1 + ( - 1/2 - 1/2*5^(1/2))*cos(2*n*Pi/5) + ( - 3/10*2^(1/2)*(5 - 5^(1/2))^(1/2))*sin(2*n*Pi/5) + ( - 1/2 + 1/2*5^(1/2))*cos(4*n*Pi/5) + (3/10*2^(1/2)*(5 + 5^(1/2))^(1/2))*sin(4*n*Pi/5)) [From Richard Choulet, Dec 14 2008]

G.f. x^5*( 9-11*x+4*x^2+2*x^4-11*x^5+12*x^6-4*x^7 ) / ( (x^4+x^3+x^2+x+1)*(x-1)^4 ). - R. J. Mathar, Jun 23 2013

CROSSREFS

A152894 [From Richard Choulet, Dec 14 2008]

Sequence in context: A227650 A076093 A085585 * A108945 A177430 A256705

Adjacent sequences:  A026059 A026060 A026061 * A026063 A026064 A026065

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified January 24 04:35 EST 2020. Contains 331183 sequences. (Running on oeis4.)