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 A034811 Concatenation of 'nextprime(n) and n and prevprime(n)' is a prime. 1
 8, 23, 32, 36, 44, 54, 66, 74, 77, 84, 91, 104, 113, 115, 122, 130, 132, 162, 174, 178, 187, 188, 191, 204, 212, 222, 224, 232, 235, 259, 267, 281, 286, 295, 302, 305, 317, 325, 344, 353, 367, 368, 384, 389, 391, 401, 406, 427, 430, 433, 457, 458, 461, 464 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS Harvey P. Dale, Table of n, a(n) for n = 0..1000 EXAMPLE n=353 -> next prime is 359, previous prime is 349, thus '359353349' is a prime. MATHEMATICA Select[Range[500], PrimeQ[FromDigits[Flatten[IntegerDigits/@ { NextPrime[#], #, NextPrime[ #, -1]}]]]&] (* Harvey P. Dale, Jan 12 2016 *) CROSSREFS Cf. A034808-A034821. Sequence in context: A029755 A022420 A326741 * A283848 A341770 A287167 Adjacent sequences: A034808 A034809 A034810 * A034812 A034813 A034814 KEYWORD nonn,base AUTHOR Patrick De Geest, Oct 15 1998 STATUS approved

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Last modified May 29 04:03 EDT 2023. Contains 363029 sequences. (Running on oeis4.)