The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.

P-defects p - N(p) of the congruence y^2 + x*y + y == x^3 + x^2 - 10*x - 10 (mod p) for primes p,where N(p) is the number of solutions given for p = prime(n) by A275742(n).

a(n) = prime(n) - A275742(n), n >= 1, where A275742(n) is the number of solutions to the congruence y^2 + x*y + y == x^3 + x^2 - 10*x - 10 (mod prime(n)).