1,1

a(n) > 0 for every n >= 3 under Dickson's conjecture.

Table of n, a(n) for n=1..4.

Wikipedia, Magic square

Wikipedia, Primes in arithmetic progression

Index entries for sequences related to magic squares

Index entries for sequences related to primes in arithmetic progressions

Cf. A113827, A269325, A269904.

Sequence in context: A012333 A012329 A064156 * A012335 A012331 A037096

Adjacent sequences: A269902 A269903 A269904 * A269906 A269907 A269908

nonn,hard,more

Arkadiusz Wesolowski, Mar 07 2016

approved