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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
OFFSET
1,1
COMMENTS
All terms of A108166 are in the sequence.
LINKS
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
KEYWORD
nonn
AUTHOR
Vladimir Shevelev, Apr 14 2010
EXTENSIONS
Corrected by R. J. Mathar, May 03 2013
STATUS
approved