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A103164
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Integers but with the primes squared.
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6
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0, 1, 4, 9, 4, 25, 6, 49, 8, 9, 10, 121, 12, 169, 14, 15, 16, 289, 18, 361, 20, 21, 22, 529, 24, 25, 26, 27, 28, 841, 30, 961, 32, 33, 34, 35, 36, 1369, 38, 39, 40, 1681, 42, 1849, 44, 45, 46, 2209, 48, 49, 50, 51, 52, 2809, 54, 55, 56, 57, 58, 3481, 60, 3721, 62, 63, 64
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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! mod n^2) + n, n>0, n != 4. - Gary Detlefs, Feb 21 2011
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EXAMPLE
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a(4) = 4 because 4 is composite.
a(5) = 25 because 5 is prime and 5^2 = 25.
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MATHEMATICA
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PROG
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(Magma) [0] cat [IsPrime(n) select n^2 else n: n in [1..70]]; // Vincenzo Librandi, Feb 17 2017
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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