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Link to original content: http://oeis.org/A061083
A061083 - OEIS
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A061083
Fibonacci-type sequence based on division: a(0) = 1, a(1) = 2 and a(n) = a(n-2)/a(n-1) but ignore decimal point.
2
1, 2, 5, 4, 125, 32, 390625, 8192, 476837158203125, 17179869184, 277555756156289135105907917022705078125, 618970019642690137449562112
OFFSET
0,2
LINKS
Reinhard Zumkeller, Table of n, a(n) for n = 0..17
FORMULA
a(n) = k^(n-th Fibonacci number) with k=2 if n is odd, k=5 if n is even
EXAMPLE
a(6) = 390625, since a(4)/a(5) = 125/32 = 3.90625
PROG
(Haskell)
a061083 n = a061083_list !! n
a061083_list = 1 : 2 : zipWith divIgnPnt a061083_list (tail a061083_list)
where divIgnPnt x y = ddiv (10 * m) x' where
ddiv u w | r == 0 = 10 * w + q
| otherwise = ddiv (10 * r) (10 * w + q)
where (q, r) = divMod u y
(x', m) = divMod x y
-- Reinhard Zumkeller, Dec 29 2011
CROSSREFS
Cf. A061084 for subtraction, A000301 for multiplication and A000045 for addition - the common Fibonacci numbers
Sequence in context: A307131 A210419 A206484 * A177039 A075102 A209883
KEYWORD
nonn,easy,nice,base
AUTHOR
Ulrich Schimke (ulrschimke(AT)aol.com)
STATUS
approved