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 A187114 Primes of the form abcdabcd..abcdab. 1
 110311, 110711, 111211, 111611, 112111, 113011, 113111, 114311, 115211, 115811, 116411, 116911, 117511, 117811, 117911, 118211, 118411, 119311, 119611, 130513, 131113, 131213, 131413, 131713, 132113, 132313, 133013, 133213, 133813, 134213, 134513, 135613 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS The sequence appears to be infinite. The number of terms below 10^1000 are 5211. LINKS Shyam Sunder Gupta, Table of n, a(n) for n = 1..2711 EXAMPLE a(2)= 110711 is in the sequence because it is a prime of the form abcdab. MATHEMATICA s[n_]:=Select[Union@Flatten@Table[FromDigits@Flatten@Join[IntegerDigits@Table[b, {n}], {IntegerDigits@Floor[b/100]}], {b, 1000, 9999}], PrimeQ]; Array[s, 2]//Flatten CROSSREFS Cf. A228625, A228627 Sequence in context: A138722 A122240 A250591 * A145872 A254853 A250533 Adjacent sequences: A187111 A187112 A187113 * A187115 A187116 A187117 KEYWORD nonn,base AUTHOR Shyam Sunder Gupta, Aug 30 2013 STATUS approved

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Last modified September 11 15:58 EDT 2024. Contains 375836 sequences. (Running on oeis4.)