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A080672
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Numbers having divisors 2 or 3 or 5 or 7.
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4
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2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22, 24, 25, 26, 27, 28, 30, 32, 33, 34, 35, 36, 38, 39, 40, 42, 44, 45, 46, 48, 49, 50, 51, 52, 54, 55, 56, 57, 58, 60, 62, 63, 64, 65, 66, 68, 69, 70, 72, 74, 75, 76, 77, 78, 80, 81, 82, 84, 85, 86, 87, 88, 90, 91, 92, 93
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refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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COMMENTS
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A020639(a(n)) <= 7; A210679(a(n)) > 0. [Reinhard Zumkeller, Apr 02 2012]
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LINKS
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_Reinhard Zumkeller_, Table of n, a(n) for n = 1..10000
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PROG
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(PARI) div2357(n) = { for(x=1, n, if(gcd(x, 210)<>1, print1(x" ")) ) }
(Haskell)
a080672 n = a080672_list !! (n-1)
a080672_list = filter ((<= 7) . a020639) [2..]
-- Reinhard Zumkeller, Apr 02 2012
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CROSSREFS
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Cf. A020639, A008364 (complement), A002473 (subsequence).
Sequence in context: A129523 A164713 A070331 * A056757 A225737 A079333
Adjacent sequences: A080669 A080670 A080671 * A080673 A080674 A080675
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KEYWORD
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easy,nonn
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AUTHOR
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Cino Hilliard (hillcino368(AT)gmail.com), Mar 02 2003
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EXTENSIONS
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Offset fixed by Reinhard Zumkeller, Apr 02 2012
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STATUS
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approved
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