1995137domain: NAppears in sequencesa(n) is the minimal odd evil k, such that k^i, i=1,2,...,n, all are evil, and a(n)=0, if there is no such k.at n=19A230495a(n) is the least number k such that {k, k^2, ..., k^n} are all evil numbers (A001969), but k^(n+1) is not.at n=19A345398