cp's OEIS Frontend

A177868 a(n) = number of 2-digit primes with digit sum n, where n runs through the non-multiples of 3 in the range [2..17].

%I A177868 #23 Sep 18 2015 15:42:09
%S A177868 1,2,2,2,3,3,3,1,1,2,1
%N A177868 a(n) = number of 2-digit primes with digit sum n, where n runs through the non-multiples of 3 in the range [2..17].
%H A177868 <a href="/A177868/b177868.txt">Table of n, a(n) for n = 1..11</a>
%H A177868 BigPrimes.net, <a href="http://www.bigprimes.net/sum-of-digits/">Digit sums of primes</a>
%e A177868 Digital sums of 2-digit primes
%e A177868 Sum     count
%e A177868 2       1
%e A177868 4       2
%e A177868 5       2
%e A177868 7       2
%e A177868 8       3
%e A177868 10      3
%e A177868 11      3
%e A177868 13      1
%e A177868 14      1
%e A177868 16      2
%e A177868 17      1
%Y A177868 For 2- through 9-digit primes the counts are in A177868, A178183, A178447, A178571, A178605, A178876, A178879, A178884.
%Y A177868 Cf. 2nd row of A178701.
%K A177868 nonn,base,fini,full
%O A177868 1,2
%A A177868 _N. J. A. Sloane_, Dec 28 2010