A331137 a(n) = Sum_{primes p <= n} b(p-1), where b = A108548.

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, 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, 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

Offset

1,3

Links

Table of n, a(n) for n=1..93.

Yoichi Motohashi, On the distribution of prime numbers which are of the form x^2+y^2+1, Acta Arith. 16 (1969/70), 351-363. MR0288086 (44 #5284).

Crossrefs

Cf. A108548.

Sequence in context: A156874 A294234 A078767 * A093125 A226390 A156081

Adjacent sequences: A331134 A331135 A331136 * A331138 A331139 A331140

Keyword

nonn

Author

N. J. A. Sloane, Jan 11 2020

Status

approved