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A007638 3n^2 - 3n + 23 is composite.
(Formerly M5129)
+0
1
23, 24, 28, 31, 39, 44, 45, 46, 47, 50, 52, 56, 57, 60, 63, 67, 69, 70, 71, 79, 80, 85, 86, 88, 89, 90, 92, 93, 96, 97, 102, 107, 108, 112, 115, 116, 118, 119, 121, 122, 123, 126, 128, 131, 134, 137, 138, 139, 143, 144, 145, 147, 148, 151, 153, 156, 157, 161, 162 (list; graph; listen)
OFFSET

1,1

REFERENCES

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

CROSSREFS

Sequence in context: A022357 A165844 A062999 this_sequence A031332 A122470 A022393

Adjacent sequences: A007635 A007636 A007637 this_sequence A007639 A007640 A007641

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), Mira Bernstein, Robert G. Wilson v (rgwv(AT)rgwv.com)

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Last modified December 5 20:25 EST 2009. Contains 170428 sequences.


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