1506138481domain: NAppears in sequencesa(n) = (10*n+7)^4.at n=19A017356a(n) = (11*n + 10)^4.at n=17A017512a(n) = (12*n + 5)^4.at n=16A017584Squares which are palindromes in base 14.at n=26A030074Fourth power of primes of the form 4k+1 (A002144).at n=20A080175