1,1

All p^2 are congruent to {1, 9} (mod 40), as in A107145.

Rational primes that decompose in the field Q(sqrt(-10)). - N. J. A. Sloane, Dec 26 2017

Table of n, a(n) for n=1..54.

Zak Seidov, First 1000 terms

Index to sequences related to decomposition of primes in quadratic fields

Load the Maple program HH given in A296920. Then run HH(-10, 200); This produces A155488, A296925, A293859. - N. J. A. Sloane, Dec 26 2017

Cf. A107145 (Primes of the form x^2 + 40y^2).

Sequence in context: A160024 A063911 A087489 * A100350 A084467 A245179

Adjacent sequences: A155485 A155486 A155487 * A155489 A155490 A155491

nonn

Zak Seidov, Jan 23 2009

approved