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A029566 Quasi-Carmichael numbers to base -6: squarefree composites n such that prime p|n ==> p+6|n+6. 3
148219, 287274, 3543794, 38718219, 142500794, 211860799, 293790169, 378321938, 552333594, 850684829, 1033256883, 1454938619, 1464112007, 1493284930, 1848698699, 2692083869, 3183401369, 3428629709, 3447827069 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Giovanni Resta, Table of n, a(n) for n = 1..93 (terms < 5*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[#, 6] &] (* Giovanni Resta, May 21 2013 *)

CROSSREFS

Sequence in context: A252909 A254088 A254095 * A210094 A236900 A184503

Adjacent sequences:  A029563 A029564 A029565 * A029567 A029568 A029569

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified September 27 03:21 EDT 2020. Contains 337380 sequences. (Running on oeis4.)