75002

Appears in sequences

• A nonlinear binomial sum.at n=21A000126
• Trajectory of 3 under map n->7n+1 if n odd, n->n/2 if n even.at n=35A037101
• a(0)=7; a(n) = 7*a(n-1) + 1 if a(n-1) is odd, a(n) = a(n-1)/2 otherwise.at n=40A271623