53468

Appears in sequences

• a(n) is the least index such that the least primitive root of the a(n)-th prime is n, or zero if no such prime exists.at n=61A066529
• a(n) = A000041(n) + n*A032741(n).at n=42A168015
• Number of nX3 0..1 arrays with every element equal to 0, 1, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=19A300501