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A061447
Primitive part of Lucas(n).
10
1, 3, 4, 7, 11, 6, 29, 47, 19, 41, 199, 46, 521, 281, 31, 2207, 3571, 321, 9349, 2161, 211, 13201, 64079, 2206, 15251, 90481, 5779, 101521, 1149851, 2521, 3010349, 4870847, 9901, 4250681, 64681, 103681, 54018521, 29134601, 67861, 4868641, 370248451
OFFSET
1,2
LINKS
J. Brillhart, P. L. Montgomery and R. D. Silverman, Tables of Fibonacci and Lucas factorizations, Math. Comp. 50 (1988), 251-260, S1-S15. Math. Rev. 89h:11002.
FORMULA
Primitive part of L(n) is primitive part of F(2n).
a(n) = Product_{ d divides 2*n } Fibonacci(2*n/d)^mu(d). - Vladeta Jovovic, Mar 08 2004
MATHEMATICA
t={1}; Do[f=LucasL[n]; Do[f=f/GCD[f, t[[d]]], {d, Most[Divisors[n]]}]; AppendTo[t, f], {n, 2, 100}]; t
CROSSREFS
KEYWORD
nonn
AUTHOR
David Broadhurst, Jun 10 2001
EXTENSIONS
More terms from Vladeta Jovovic, Mar 08 2004
STATUS
approved