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A117451 Expansion of (1-x+x^2+x^5)/((1-x)(1-x^5)). 2
1, 0, 1, 1, 1, 3, 2, 3, 3, 3, 5, 4, 5, 5, 5, 7, 6, 7, 7, 7, 9, 8, 9, 9, 9, 11, 10, 11, 11, 11, 13, 12, 13, 13, 13, 15, 14, 15, 15, 15, 17, 16, 17, 17, 17, 19, 18, 19, 19, 19, 21, 20, 21, 21, 21, 23, 22, 23, 23, 23, 25, 24, 25, 25, 25, 27, 26, 27, 27, 27, 29, 28, 29, 29, 29, 31, 30, 31 (list; graph; refs; listen; history; internal format)
OFFSET

0,6

COMMENTS

Partial sums are A117450. Partial sums of A117452.

FORMULA

a(n)=a(n-1)+a(n-5)-a(n-6); a(n)=-1+(1/2+sqrt(5)/10)cos(4*pi*n/5)-sqrt(1/50-sqrt(5)/250)*sin(4*pi*n/5) +(1/2-sqrt(5)/10)*cos(2*pi*n/5)+sqrt(1/50+sqrt(5)/250)*sin(2*pi*n/5)+(2n+5)/5.

CROSSREFS

Sequence in context: A065801 A205237 A086920 * A130970 A144733 A091460

Adjacent sequences:  A117448 A117449 A117450 * A117452 A117453 A117454

KEYWORD

easy,nonn

AUTHOR

Paul Barry (pbarry(AT)wit.ie), Mar 16 2006

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Last modified February 15 11:57 EST 2012. Contains 205782 sequences.