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A176275 Numbers of the form 6k+1 with the least prime divisor of the form 6m-1 2
25, 55, 85, 115, 121, 145, 175, 187, 205, 235, 253, 265, 289, 295, 319, 325, 355, 385, 391, 415, 445, 451, 475, 493, 505, 517, 529, 535, 565, 583, 595, 625, 649, 655, 667, 685, 697, 715, 745, 775, 781, 799, 805, 835, 841, 865, 895, 901, 913, 925, 943, 955, 979, 985, 1003, 1015, 1045, 1075 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

All terms of A108166 are in the sequence.

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000

MATHEMATICA

Select[6*Range[200] + 1, IntegerQ[(FactorInteger[#][[1, 1]] + 1)/6] &] (* Harvey P. Dale, Sep 19 2018 *)

PROG

(PARI) isok(n) = ((n % 6) == 1) && (n != 1) && ((vecmin(factor(n)[, 1]) % 6) == 5); \\ Michel Marcus, Feb 08 2016

CROSSREFS

Cf. A176274, A176262, A176256, A176257, A176258, A176255, A108166, A016969, A007528.

Sequence in context: A186892 A206075 A276448 * A108166 A080863 A091214

Adjacent sequences:  A176272 A176273 A176274 * A176276 A176277 A176278

KEYWORD

nonn

AUTHOR

Vladimir Shevelev, Apr 14 2010

EXTENSIONS

Corrected by R. J. Mathar, May 03 2013

STATUS

approved

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Last modified September 19 12:57 EDT 2019. Contains 327198 sequences. (Running on oeis4.)