A106548 Perfect squares n^2 which are both the sum and the difference of two primes (otherwise 0).

0, 4, 9, 16, 0, 36, 0, 64, 81, 100, 0, 144, 0, 196, 225, 256, 0, 324, 0, 400, 441, 484, 0, 576, 0, 676, 0, 784, 0, 900, 0, 1024, 1089, 1156, 0, 1296, 0, 1444, 0, 1600, 0, 1764, 0, 1936, 0, 2116, 0, 2304, 0, 2500, 0, 2704, 0, 2916, 0, 3136, 0, 3364, 0, 3600, 0, 3844, 0

Offset: 1

Author

Alexandre Wajnberg, May 08 2005

Keywords

• easy
• nonn

Crossrefs

Cf. A106544-A106547, A106562-A106564, A106571, A106573-A106575, A106577.

Formula

a(n) = Min(A106545(n), A106546(n)).

Extensions

Extended by Ray Chandler, May 12 2005