%I #10 Jan 11 2020 15:30:04
%S 0,1,2,2,3,3,3,3,3,3,4,4,4,4,4,4,5,5,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
%T 6,6,7,7,7,7,8,8,8,8,8,8,8,8,8,8,8,8,9,9,9,9,9,9,10,10,10,10,10,10,10,
%U 10,10,10,10,10,10,10,11,11,11,11,11,11,11,11,11,11,12,12,12,12,12,12,12,12,12,12,12
%N a(n) = Sum_{primes p <= n} b(p-1), where b = A108548.
%H Yoichi Motohashi, <a href="http://matwbn.icm.edu.pl/ksiazki/aa/aa16/aa1633.pdf">On the distribution of prime numbers which are of the form x^2+y^2+1</a>, Acta Arith. 16 (1969/70), 351-363. MR0288086 (44 #5284).
%Y Cf. A108548.
%K nonn
%O 1,3
%A _N. J. A. Sloane_, Jan 11 2020
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