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 A076205 Numbers n such that 30*n+{1,7,11,13,17,19,23,29} are all composite. 7
 360, 523, 654, 941, 1020, 1047, 1064, 1136, 1188, 1213, 1264, 1280, 1343, 1355, 1445, 1477, 1515, 1526, 1530, 1533, 1582, 1623, 1652, 1693, 1842, 1900, 1960, 2018, 2039, 2129, 2208, 2280, 2309, 2332, 2406, 2413, 2440, 2499, 2539, 2622, 2633, 2650, 2657 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 REFERENCES H. S. M. Coxeter and W. O. J. Moser, Generators and Relations for Discrete Groups, 4th ed., Springer-Verlag, NY, reprinted 1984, p. 141. LINKS Klaus Brockhaus, Table of n, a(n) for n = 1..6829 (terms < 100000) PROG (PARI) {cav(mx)= local(wp=[1, 7, 11, 13, 17, 19, 23, 29], v=[], i, j, m); for(k=1, mx, i=k*30; j=1; m=1; while(m&&(j<9), m=!isprime(i+wp[j]); j+=1); if(m, v=concat(v, k))); return(v)} (MAGMA) [ n: n in [0..3000] | forall{ q: q in [1, 7, 11, 13, 17, 19, 23, 29] | not IsPrime(30*n+q) } ]; // Klaus Brockhaus, Feb 24 2011 CROSSREFS Cf. A005776, A007775, A100418-A100423. Sequence in context: A072414 A163569 A063067 * A048978 A056502 A056492 Adjacent sequences:  A076202 A076203 A076204 * A076206 A076207 A076208 KEYWORD easy,nonn AUTHOR Donald S. McDonald, Nov 02 2002 EXTENSIONS More terms from Ferenc Adorjan (fadorjan(AT)freemail.hu), Nov 19 2004 Edited by Don Reble, Nov 17 2005 Edited by N. J. A. Sloane, Sep 14 2008 at the suggestion of R. J. Mathar STATUS approved

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Last modified January 24 04:35 EST 2020. Contains 331183 sequences. (Running on oeis4.)