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A029560 Quasi-Carmichael numbers to base 3: squarefree composites n such that prime p|n ==> p-3|n-3. 0
35, 1295, 2635, 6083, 6923, 7315, 7843, 13363, 24335, 25795, 26243, 29795, 31003, 43043, 44099, 49283, 50435, 54131, 115843, 138043, 147223, 191843, 234883, 254467, 388433, 471523, 472739, 544643, 618103, 631123, 725903, 790195, 819283, 862403 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

COMMENTS

Define C(k) to be the numbers n such that n is composite and squarefree and for p prime, p|n => p+k|n+k (p+k and n+k positive); sequence gives C(-3).

These are called 3-Korselt numbers by Bouallegue et al.

LINKS

Index entries for sequences related to Carmichael numbers.

K. Bouallegue, O. Echi, R. G. E. Pinch, Korselt numbers and sets, Intl. J. Numb. Theory 6 (2) (2010) 257-269

CROSSREFS

Cf. A120944

Sequence in context: A095153 A009979 A158733 * A195617 A135923 A180883

Adjacent sequences:  A029557 A029558 A029559 * A029561 A029562 A029563

KEYWORD

nonn

AUTHOR

David W. Wilson (davidwwilson(AT)comcast.net)

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Last modified February 16 12:15 EST 2012. Contains 205909 sequences.