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A145315
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Numbers n for which the set {30*n-13, 30*n-11, 30*n-7, 30*n-1, 30*n+1, 30*n+7, 30*n+11, 30*n+13} forms a symmetrical prime octuplet.
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1
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1, 43, 3772, 86022, 691263, 1940280, 2445785, 2539018, 3355288, 4492167, 4598112, 5517709, 5731956, 7466941, 8409234, 9817872, 10324700, 10390862, 12138468, 13631232, 17181592, 17382707, 17609073, 20633677, 20897582, 22760333
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| N is always +/- 1 (mod 7).
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MATHEMATICA
| spoQ[n_]:=Module[{c=30n}, And@@PrimeQ[{c-13, c-11, c-7, c-1, c+1, c+7, c+11, c+13}]]; Select[Range[23000000], spoQ] (* From Harvey P. Dale, Oct 10 2011 *)
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CROSSREFS
| Sequence in context: A015258 A130014 A015323 * A110704 A060485 A081795
Adjacent sequences: A145312 A145313 A145314 * A145316 A145317 A145318
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KEYWORD
| nonn
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AUTHOR
| Andrey V. Kulsha (Andrey_601(AT)tut.by), Oct 07 2008
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