This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A080672 Numbers having divisors 2 or 3 or 5 or 7. 4
 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 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS A020639(a(n)) <= 7; A210679(a(n)) > 0. [Reinhard Zumkeller, Apr 02 2012] LINKS _Reinhard Zumkeller_, Table of n, a(n) for n = 1..10000 PROG (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 CROSSREFS Cf. A020639, A008364 (complement), A002473 (subsequence). Sequence in context: A129523 A164713 A070331 * A056757 A225737 A079333 Adjacent sequences:  A080669 A080670 A080671 * A080673 A080674 A080675 KEYWORD easy,nonn AUTHOR Cino Hilliard (hillcino368(AT)gmail.com), Mar 02 2003 EXTENSIONS Offset fixed by Reinhard Zumkeller, Apr 02 2012 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified May 21 14:47 EDT 2013. Contains 225504 sequences.