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A078492
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No-prime decades.
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1
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200, 320, 510, 530, 620, 840, 890, 1070, 1130, 1140, 1260, 1330, 1340, 1350, 1410, 1460, 1500, 1640, 1670, 1680, 1710, 1760, 1790, 1850, 1890, 1920, 1960, 2040, 2070, 2100, 2180, 2190, 2320, 2360, 2400, 2480, 2490, 2510, 2560, 2580, 2820, 2940, 2980
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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FORMULA
| Numbers n == 0 mod 10 such that n+1, n+3, n+7, n+9 not prime.
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PROG
| (PARI) decadenopr(n1, n2) = { forstep(x=n1, n2, 10, if(!isprime(x+1) && !isprime(x+3) && !isprime(x+7) && !isprime(x+9), print1(x" "); ); ); }
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CROSSREFS
| Sequence in context: A192545 A118118 A124472 * A166256 A004966 A117412
Adjacent sequences: A078489 A078490 A078491 * A078493 A078494 A078495
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KEYWORD
| easy,nonn
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AUTHOR
| Cino Hilliard (hillcino368(AT)gmail.com), Jan 04 2003
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