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 A080841 Number of sexy primes < 10^n. 1
 0, 15, 74, 411, 2447, 16386, 117207, 879908, 6849047, 54818296, 448725003, 3741217498 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS The corresponding numbers for twin primes and cousin primes are in A007508 and A080840, the greater of twin primes, cousin primes and sexy primes are in A006512, A046132 and A046117 respectively. LINKS Eric Weisstein's World of Mathematics, Sexy Primes. A. Granville, G. Martin, Prime number races, Amer. Math. Monthly vol 113, no 1 (2006) p 1. PROG (PARI) {c=0; p=7; for(n=1, 9, while(p<10^n, if(isprime(p-6), c++); p=nextprime(p+1)); print1(c, ", "))} CROSSREFS Cf. A023201, A046117. Cf. A007508, A080840, A006512, A046132, A046117. Sequence in context: A212092 A022817 A171341 * A022675 A214453 A317657 Adjacent sequences:  A080838 A080839 A080840 * A080842 A080843 A080844 KEYWORD nonn AUTHOR Jason Earls, Mar 28 2003 EXTENSIONS a(8) and a(9) from Klaus Brockhaus, Mar 30 2003 More terms from R. J. Mathar, Aug 05 2007 STATUS approved

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Last modified September 23 16:41 EDT 2020. Contains 337315 sequences. (Running on oeis4.)