81281

Properties

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 22.at n=26A031610
• Decimal part of a(n)^(1/3) starts with a 'nine digits' anagram.at n=29A034278
• Sums of 5 distinct powers of 5.at n=26A038477
• Primes which can be expressed as sum of distinct powers of 5.at n=14A077719
• Numbers whose anti-divisors sum to a perfect cube.at n=39A109351
• Primes p such that p+2, n*(p+2)+6 and p*(p+2)+8 are also prime.at n=17A130735
• Primes of the form 5*p^2+5*p+1, where p is a prime.at n=16A225874
• Primes whose base-5 representation also is the base-2 representation of a prime.at n=10A235462
• Prime factors of generalized Fermat numbers of the form 12^(2^m) + 1 with m >= 0.at n=12A273950
• Twice-partitioned numbers where the first partition is strict and the latter partitions are constant.at n=36A279786
• Primes having only {1, 2, 8} as digits.at n=34A385775
• Prime numbersat n=7953