4111111141domain: NAppears in sequencesPrimes p such that (x1*x2*...*xk)^(x1+x2+...+xk) = (x1+x2+...+xk)^(x1*x2*...*xk) where x1x2...xk are the digits of p in base 10.at n=28A064157Primes of the form XYYYYYYX, where Y is a single digit.at n=10A228376