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A088545 Quotient Fib(5n)/(5*Fib(n)), where Fib(n)=A000045(n). 2
1, 11, 61, 451, 3001, 20801, 141961, 974611, 6675901, 45768251, 313671601, 2150012161, 14736206161, 101003973851, 692290189501, 4745031073651, 32522917584361, 222915417520961, 1527884938291801, 10472279325329251, 71778069881360701, 491974211042344811, 3372041404278257761 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..23.

FORMULA

a(n) = 5*Fib(n)^2*{Fib(n)^2 + (-1)^n} + 1 = 5*A007598(n)*A059929(n+1) + 1.

a(n) = A103326(n) / 5.

G.f.: -x*(x^4-4*x^3-9*x^2+6*x+1) / ((x-1)*(x^2-7*x+1)*(x^2+3*x+1)). [Colin Barker, Jul 16 2013]

PROG

a(n)=fibonacci(5*n)/(5*fibonacci(n)); \\ Joerg Arndt, Jul 16 2013

CROSSREFS

Sequence in context: A156095 A068846 A092164 * A259257 A289646 A020454

Adjacent sequences:  A088542 A088543 A088544 * A088546 A088547 A088548

KEYWORD

nonn,easy

AUTHOR

Lekraj Beedassy, Nov 17 2003

STATUS

approved

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Last modified May 23 03:10 EDT 2019. Contains 323507 sequences. (Running on oeis4.)