275942

Appears in sequences

• Numerators of continued fraction convergents to sqrt(778).at n=7A042500
• a(1)=2; for n > 1, a(n) = 2^(n-2) + (1/(2n-2)) * Sum_{ d divides n-1 } phi(2d)*2^((n-1)/d).at n=19A216957