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A085775
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Numbers k such that (k / sum of digits of k) and (k+1 / sum of digits of k+1) are both prime.
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7
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152, 803, 1016, 1853, 3031, 3032, 3438, 7361, 7542, 7587, 8226, 8337, 10095, 10278, 10307, 11354, 11646, 13116, 13117, 13881, 17153, 21434, 21906, 23412, 26221, 28824, 30254, 31112, 32166, 34218, 35513, 38322, 40335, 41058, 44373, 45380
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OFFSET
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1,1
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LINKS
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EXAMPLE
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152 is a term since 152/(1+5+2) = 19 and 153/(1+5+3) = 17 are both prime.
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MATHEMATICA
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moranQ[n_] := PrimeQ[n / Plus @@ IntegerDigits[n]]; Select[Range[50000], moranQ[#] && moranQ[#+1] &] (* Amiram Eldar, Apr 25 2020 *)
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CROSSREFS
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KEYWORD
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base,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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