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A172182
Nonprimes of the form 6k + 1 or 6k + 2.
1
1, 8, 14, 20, 25, 26, 32, 38, 44, 49, 50, 55, 56, 62, 68, 74, 80, 85, 86, 91, 92, 98, 104, 110, 115, 116, 121, 122, 128, 133, 134, 140, 145, 146, 152, 158, 164, 169, 170, 175, 176, 182, 187, 188, 194, 200, 205, 206, 212, 217, 218, 224, 230, 235, 236, 242, 247
OFFSET
1,2
FORMULA
a(n) ~ 3n. - Charles R Greathouse IV, May 25 2011
PROG
(Magma) A172182:=func<n | exists{k: k in [0..n div 6] | n in [6*k+1, 6*k+2] and not IsPrime(n)}>; [ n: n in [1..247] | A172182(n) ]; // Bruno Berselli, May 25 2011
CROSSREFS
Cf. A045375.
Sequence in context: A374223 A063288 A136798 * A091575 A091572 A369644
KEYWORD
nonn,easy
AUTHOR
EXTENSIONS
Entries checked by R. J. Mathar, May 22 2010
Retitled by Charles R Greathouse IV, May 25 2011
STATUS
approved