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A301919
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a(n) is the least value of k for which A301918(n) divides 3^k+3.
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2
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0, 1, 3, 4, 9, 10, 15, 16, 10, 5, 22, 27, 6, 12, 7, 40, 45, 25, 51, 18, 57, 64, 69, 70, 75, 26, 40, 82, 87, 9, 99, 100, 106, 112, 117, 61, 129, 135, 16, 141, 142, 147, 18, 159, 166, 85, 88, 177, 62, 94, 190, 195, 100, 201, 103, 74, 225, 115, 231, 232, 244, 84
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OFFSET
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1,3
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COMMENTS
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This can be used to identify P+1 values to primality test potential primes P of the form 3^k+2, i.e., A051783.
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LINKS
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FORMULA
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EXAMPLE
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All values of 3^k+3 are multiples of 2, so 3^0+3 = 4 is the least value of k which is a multiple of 2.
a(10) = 5 and A301918(10) = 41 so 3^5+3 = 246 is the first multiple of 41 which can be written in the form 3^k+3.
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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