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A240531
Numbers n such that 24*n + 19 is not prime.
1
3, 4, 7, 9, 10, 14, 16, 17, 18, 19, 24, 27, 29, 31, 34, 38, 39, 40, 41, 42, 44, 45, 47, 49, 50, 51, 52, 54, 55, 56, 57, 58, 59, 62, 64, 66, 68, 69, 73, 74, 75, 76, 78, 79, 80, 81, 84, 85, 87, 89, 92, 94, 95, 96, 99, 100, 101, 103, 104, 106, 107, 108, 109
OFFSET
1,1
COMMENTS
Integer values of (2*h*k + k + h - 9)/12, with h >= k >= 1.
LINKS
MATHEMATICA
Select[Range[110], !PrimeQ[24 # + 19] &]
PROG
(Magma) [n: n in [1..220]| not IsPrime(24*n+19)];
CROSSREFS
Cf. A139532.
Sequence in context: A276786 A002977 A024799 * A212013 A256761 A039579
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Apr 13 2014
STATUS
approved