155062domain: NAppears in sequencesa(n) = number of pairs {x,y} with (x,y > 1) such that x^y (= terms of A072103) has bit length n.at n=37A365930Consecutive states of the linear congruential pseudo-random number generator (7200*s + 1) mod 23^4 when started at s=1.at n=18A383162