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A029570 Quasi-Carmichael numbers to base -10: squarefree composites n such that prime p|n ==> p+10|n+10. 3

%I #13 May 21 2013 11:11:01

%S 935,65195,861851,1486895,3061265,4497686,5164226,5322419,6153830,

%T 8547998,9125855,22050809,22734611,25345310,32812406,40860755,

%U 45631898,50315135,51436130,61532153,74613347,81080990,86724215,94903370

%N Quasi-Carmichael numbers to base -10: squarefree composites n such that prime p|n ==> p+10|n+10.

%H Giovanni Resta, <a href="/A029570/b029570.txt">Table of n, a(n) for n = 1..293</a> (terms < 10^12)

%H <a href="/index/Ca#Carmichael">Index entries for sequences related to Carmichael numbers.</a>

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

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

%K nonn

%O 1,1

%A _David W. Wilson_

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Last modified April 24 03:08 EDT 2024. Contains 371918 sequences. (Running on oeis4.)