85849

Appears in sequences

• a(n) = (8*n + 5)^2.at n=36A017126
• a(n) = (10*n + 3)^2.at n=29A017306
• a(n) = (11*n + 7)^2.at n=26A017474
• a(n) = (12*n + 5)^2.at n=24A017582
• Strong pseudoprimes to base 91.at n=20A020317
• Numbers whose sum of divisors is prime.at n=22A023194
• Number of n-node rooted trees of height at most 9.at n=15A034826
• Squares with initial digit '8'.at n=17A045792
• sigma(n)-n is a perfect square associated with A049226.at n=22A049228
• Prime powers p^w (w >= 2) such that p^w-2 is prime.at n=35A053704
• The periodic point counting sequence for the toral automorphism given by the polynomial of (conjectural) smallest Mahler measure. The map is x -> Ax mod 1 for x in [0,1)^10, where A is the companion matrix for the polynomial x^10+x^9-x^7-x^6-x^5-x^4-x^3+x+1.at n=48A059928
• Squares k^2 such that A068864(k) = k^2.at n=24A068867
• Smallest composite k such that phi(k) > k*(1-1/n^2).at n=16A069639
• Numbers n such that sigma(n) is a power of prime (of the form p^a, p prime, a>=1).at n=42A070763
• Numbers n such that n and sigma(n) are prime powers (of the form p^k, p prime, k>=1).at n=28A071114
• Least square s such that A078142(s) is equal to the n-th prime.at n=10A076830
• Square of primes of the form 4k+1 (A002144).at n=28A080109
• Squares sandwiched between two numbers divisible by squares.at n=19A088068
• Numbers m such that Sum_{p prime|m} p^r(p) = m, where r(p) is the least positive primitive root of p (A001918).at n=32A101051
• Squares of the form 2*p+3 that are squares of primes.at n=28A110588