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A038680
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Primes ending in a (different) prime.
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2
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13, 17, 23, 37, 43, 47, 53, 67, 73, 83, 97, 103, 107, 113, 127, 131, 137, 157, 163, 167, 173, 179, 193, 197, 211, 223, 227, 229, 233, 241, 257, 263, 271, 277, 283, 293, 307, 311, 313, 317, 331, 337, 347, 353, 359, 367, 373, 379, 383, 389, 397
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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LINKS
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MATHEMATICA
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ds[n_] := NestWhileList[FromDigits[Rest[IntegerDigits[#]]] &, n, # > 9 &]; Select[Prime[Range[5, 80]], Or @@ PrimeQ /@ Rest[ds[#]] &] (* Jayanta Basu, Jul 10 2013 *)
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PROG
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(Haskell)
import Data.List (tails)
a038680 n = a038680_list !! (n-1)
a038680_list = filter (any ((== 1) . a010051. read) .
init . tail . tails . show) a000040_list
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CROSSREFS
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KEYWORD
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nonn,base,easy
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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