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A094180 Numbers n such that 4n-1 is divisible only by primes of form 4m-1 (i.e. by the Gaussian primes A002145). +0
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1, 2, 3, 5, 6, 7, 8, 11, 12, 15, 16, 17, 18, 20, 21, 25, 26, 27, 32, 33, 35, 37, 38, 41, 42, 43, 45, 48, 50, 52, 53, 56, 57, 58, 60, 61, 63, 66, 68, 70, 71, 77, 78, 83, 86, 87, 90, 91, 92, 95, 96, 97, 100, 105, 106, 108, 110, 111, 116, 117, 120, 121, 122, 123, 125, 126, 131 (list; graph; listen)
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Last modified December 10 12:37 EST 2009. Contains 170569 sequences.


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