135531

Appears in sequences

• From fundamental unit of Z[ (-n)^1/4 ].at n=25A006830
• a(n) = smallest palindrome > a(n-1) such that a(1)*a(2)*...*a(n) + 1 and a(1)*a(2)*...*a(n) - 1 are primes.at n=9A051955
• Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 01000-11100-00111-00010 pattern in any orientation.at n=14A147334
• Palindromic numbers such that the sum of the digits equals the number of divisors.at n=31A263720
• Numbers of the form (10^c-1)*the product any two (not necessarily distinct) terms of A074992.at n=10A284691
• a(2n-1) is concatenation of sequence (1,3,..,2n-3,2n-1,2n-3,..3,1) and a(2n) is concatenation of sequence (1,3,..,2n-3,2n-1,2n-1,2n-3,..3,1).at n=5A287295
• Numbers which are products of repunits.at n=16A308365