On Some Magnified Fibonacci Numbers Modulo a Lucas Number
Ram Krishna Pandey
Department of Mathematics
Indian Institute of Technology Patna
Patliputra Colony, Patna - 800013
India
Abstract:
Let, as usual, Fn and Ln
denote the nth Fibonacci number and the nth
Lucas number, respectively. In this paper, we consider the Fibonacci
numbers F2, F3, ..., Ft.
Let n ≥ 1 be an integer such that 4n+2 ≤
t ≤ 4n+5 and m = F2n+2 +
F2n+4 = L2n+3.
We prove that
the integers F2 F2n+2, F3F2n+2, . . . , FtF2n+2 modulo m all belong to
the interval [F2n+1, 3F2n+2]. Furthermore, the endpoints of the
interval [F2n+1, 3F2n+2] are obtained only by the integers F4F2n+2 and
F4n+2F2n+2, respectively.
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(Concerned with sequence
A000045.)
Received September 28 2012;
revised version received January 21 2013.
Published in Journal of Integer Sequences, January 26 2013.
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