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A065679
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If n is even, a(n) = n^2 else a(n) = n.
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3
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0, 1, 4, 3, 16, 5, 36, 7, 64, 9, 100, 11, 144, 13, 196, 15, 256, 17, 324, 19, 400, 21, 484, 23, 576, 25, 676, 27, 784, 29, 900, 31, 1024, 33, 1156, 35, 1296, 37, 1444, 39, 1600, 41, 1764, 43, 1936, 45, 2116, 47, 2304, 49, 2500, 51, 2704, 53, 2916, 55, 3136, 57
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OFFSET
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0,3
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LINKS
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FORMULA
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a(n) = n^( (n+1) (mod 2) + 1 ).
O.g.f.: x*(1+x^2)*(1+4*x-x^2)/(1-x^2)^3. - Len Smiley, Dec 05 2001
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MATHEMATICA
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Table[ n^ (Mod[n + 1, 2] + 1), {n, 0, 60} ]
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PROG
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(PARI) { for (n=0, 1000, if (n%2, a=n, a=n^2); write("b065679.txt", n, " ", a) ) } \\ Harry J. Smith, Oct 26 2009
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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