A029568 - OEIS

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A029568

Quasi-Carmichael numbers to base -8: squarefree composites n such that prime p|n ==> p+8|n+8.

343027, 387127, 1344517, 1430449, 2125642, 2383417, 3537667, 3542797, 5808067, 7592577, 7834042, 7930117, 9241627, 12122947, 15250942, 21928717, 37908667, 39355867, 39627217, 49825117, 60738622, 71092717, 90640927, 110995807

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OFFSET

1,1

LINKS

Giovanni Resta, Table of n, a(n) for n = 1..379 (terms < 10^12)

Index entries for sequences related to Carmichael numbers.

MATHEMATICA

qcp[n_, d_] := Block[{p, e}, {p, e} = Transpose@FactorInteger@n;

Length[p] > 1 && Max[e] == 1 && And @@ IntegerQ /@ ((n + d)/(p + d))]; Select[Range[10^6], qcp[#, 8] &] (* Giovanni Resta, May 21 2013 *)

CROSSREFS

Sequence in context: A363175 A306796 A365611 * A235746 A235505 A235668

Adjacent sequences: A029565 A029566 A029567 * A029569 A029570 A029571

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved