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 A048553 a(n+1) is next smallest prime beginning with a(n), initial prime is 11. 10
 11, 113, 11311, 113111, 1131113, 11311133, 1131113353, 113111335313, 11311133531339, 113111335313399, 1131113353133993, 113111335313399321, 11311133531339932153, 1131113353133993215379, 113111335313399321537911 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS Clark Kimberling, Table of n, a(n) for n = 0..498 MAPLE f:= proc(n) local p, d; for d from 1 do p:= nextprime(n*10^d); if p < (n+1)*10^d then return p fi od end proc: A[1]:= 11: for n from 2 to 20 do A[n]:= f(A[n-1]) od: seq(A[n], n=1..20); # Robert Israel, Aug 16 2015 MATHEMATICA a = {11}; Do[k = 1; w = IntegerDigits[a[[n - 1]]]; While[CompositeQ@ FromDigits[Join[w, IntegerDigits@ k]], k += 2]; AppendTo[a, FromDigits[Join[w, IntegerDigits@ k]]], {n, 2, 15}]; a (* Michael De Vlieger, Sep 21 2015 *) CROSSREFS Cf. A048549-A048556, A261199-A261201, A261269-A261270. Sequence in context: A239821 A087391 A211200 * A110799 A088089 A201966 Adjacent sequences: A048550 A048551 A048552 * A048554 A048555 A048556 KEYWORD nonn,base AUTHOR Patrick De Geest, May 15 1999 STATUS approved

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Last modified April 14 20:39 EDT 2024. Contains 371667 sequences. (Running on oeis4.)