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 A134642 Nonprime permutational numbers A134640. 7
 0, 1, 15, 21, 27, 30, 39, 45, 54, 57, 75, 78, 99, 108, 114, 120, 135, 141, 147, 156, 177, 180, 198, 201, 210, 216, 225, 228, 194, 198, 214, 222, 238, 242, 294, 298, 334, 346, 358, 366, 414, 422, 434, 446, 482, 486, 538, 542, 558, 566, 582, 586, 694, 698, 714 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 LINKS Table of n, a(n) for n=1..55. MATHEMATICA a = {}; b = {}; Do[AppendTo[b, n]; w =Permutations[b]; Do[j = FromDigits[w[[m]], n + 1]; If[PrimeQ[j], AppendTo[a, j]], {m, 1, Length[w]}], {n, 0, 10}]; a (*Artur Jasinski*) Select[Flatten[Table[FromDigits[#, n]&/@Permutations[Range[0, n-1]], {n, 5}]], !PrimeQ[#]&] (* Harvey P. Dale, Nov 30 2023 *) CROSSREFS Cf. A134640, A134641. Sequence in context: A217078 A138594 A131651 * A072974 A226025 A082686 Adjacent sequences: A134639 A134640 A134641 * A134643 A134644 A134645 KEYWORD nonn AUTHOR Artur Jasinski, Nov 05 2007, Nov 07 2007 STATUS approved

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Last modified April 22 01:34 EDT 2024. Contains 371887 sequences. (Running on oeis4.)