A092428 Numbers n such that A092255(n) == 2 (mod 3).

4, 10, 12, 13, 28, 30, 31, 36, 37, 39, 40, 82, 84, 85, 90, 91, 93, 94, 108, 109, 111, 112, 117, 118, 120, 121, 244, 246, 247, 252, 253, 255, 256, 270, 271, 273, 274, 279, 280, 282, 283, 324, 325, 327, 328, 333, 334, 336, 337, 351, 352, 354, 355, 360, 361, 363

Offset: 1

Author

Benoit Cloitre, Mar 22 2004

Keywords

• nonn

Programs

PARI

for(n=1,775,if(binomial(2*n,n)%3*abs(gcd(3^50,n)-n)>0,print1(n,",")))

Formula

A092255(n) == 2 (mod 3) iff n is not a power of 3 or n is not in A074940