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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 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS T. D. Noe, Table of n, a(n) for n=1..1000 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. C. K. Caldwell, Lucas Aurifeuillian primitive part 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 Cf. A061446, A061254, A061445, A061442, A061443. Cf. A126015 Sequence in context: A291870 A002887 A080034 * A219188 A283428 A185506 Adjacent sequences:  A061444 A061445 A061446 * A061448 A061449 A061450 KEYWORD nonn AUTHOR David Broadhurst, Jun 10 2001 EXTENSIONS More terms from Vladeta Jovovic, Mar 08 2004 STATUS approved

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Last modified September 28 17:33 EDT 2021. Contains 347716 sequences. (Running on oeis4.)