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 A111524 a(1) = 10; a(n) is smallest number >= a(n-1) such that the juxtaposition a(1)a(2)...a(n) is a prime. 11
 10, 13, 23, 49, 111, 113, 171, 211, 293, 309, 309, 469, 639, 759, 951, 1037, 1057, 1083, 1257, 1269, 1287, 1341, 1551, 1637, 1677, 1981, 1989, 2021, 2059, 2357, 2583, 2697, 2967, 3289, 6789, 7073, 7323, 7369, 7463, 7501, 7709, 7869, 8029, 8069, 8077, 8519 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS MATHEMATICA a[1] = 10; a[n_] := a[n] = Block[{k = a[n - 1] + 1 + Mod[a[n - 1], 2], c = IntegerDigits @ Table[ a[i], {i, n - 1}]}, While[ !PrimeQ[ FromDigits @ Flatten @ Append[c, IntegerDigits[k]]], k += 2]; k]; Table[ a[n], {n, 46}] (* Robert G. Wilson v *) CROSSREFS Cf. A111525, A074346, A033680, A033679, A033681, A046254, A046255, A046256, A046257, A046258, A046259. Sequence in context: A018785 A176762 A001273 * A074346 A126973 A220045 Adjacent sequences:  A111521 A111522 A111523 * A111525 A111526 A111527 KEYWORD base,nonn AUTHOR Patrick De Geest, Zak Seidov and Robert G. Wilson v, Aug 05 2005 STATUS approved

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