2136750625domain: NAppears in sequencesa(n) = (10*n + 5)^4.at n=21A017332a(n) = (11*n + 6)^4.at n=19A017464a(n) = (12*n + 11)^4.at n=17A017656RF(5): refactorable numbers with smallest prime factor 5.at n=14A120320Upper of a pair of adjacent perfect powers, both with exponents > 2.at n=26A340701