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%I #4 Sep 26 2014 13:27:26
%S 0,1,1,3,2,5,3,5,5,7,4,9,5,9,7,10,6,14,7,13,10,13,8,18,10,14,11,16,9,
%T 26,10,17,14,18,13,26,11,20,16,23,12,31,13,22,21,22,14,32,15,28,20,27,
%U 15,35,19,29,22,28,16,45,17,29,27,30,21,44,18,32,26
%N Number of primes in n-th row of triangle A077581.
%C a(n) = n - A247892(n).
%H Reinhard Zumkeller, <a href="/A247815/b247815.txt">Table of n, a(n) for n = 1..10000</a>
%F a(n) = A000720(A069213(n)) - A001221(n).
%o (Haskell)
%o a247815 = sum . map a010051' . a077581_row
%Y Cf. A000720, A001221, A010051, A069213, A077581, A247892.
%K nonn
%O 1,4
%A _Reinhard Zumkeller_, Sep 26 2014
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