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 A092206 Positive integers that are not of the form n^2 or 3n^2. 4
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 OFFSET 1,1 COMMENTS Values of n such that Q(sqrt(-n)) has 2 units. A214295(a(n)) = 0. - Reinhard Zumkeller, Jul 12 2012 LINKS Reinhard Zumkeller, Table of n, a(n) for n = 1..10000 Eric Weisstein's World of Mathematics, Unit MATHEMATICA Select[ Range[100], Not[ IntegerQ[ Sqrt[#] ] || IntegerQ[ Sqrt[#/3] ] ]&] (* Jean-François Alcover, Oct 30 2012 *) PROG (Haskell) a092206 n = a092206_list !! (n-1) a092206_list = filter ((== 0) . a214295) [1..] -- Reinhard Zumkeller, Jul 12 2012 (PARI) is(n)=!issquare(n/3^valuation(n, 3)) \\ Charles R Greathouse IV, Oct 30 2012 CROSSREFS Cf. A000290, A033428, A092205. Sequence in context: A084852 A288659 A228374 * A028746 A028779 A050007 Adjacent sequences:  A092203 A092204 A092205 * A092207 A092208 A092209 KEYWORD nonn AUTHOR Eric W. Weisstein, Feb 24 2004 STATUS approved

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Last modified November 19 05:29 EST 2018. Contains 317333 sequences. (Running on oeis4.)