186793

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 66.at n=8A031654
• Primes of the form 16*m^2 + 169, m=1,2,3,...at n=29A087862
• Primes of the form kk*k+k+1, where kk is the concatenation of k with itself.at n=21A222962
• Integer k associated with the record-breaking number A226663(n) of primitive Collatz-like 3x+k cycles.at n=14A226664
• Number of (n+2)X(2+2) 0..1 arrays with each row and column not divisible by 7, read as a binary number with top and left being the most significant bits.at n=2A263114
• Number of (n+2)X(3+2) 0..1 arrays with each row and column not divisible by 7, read as a binary number with top and left being the most significant bits.at n=1A263115
• T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with each row and column not divisible by 7, read as a binary number with top and left being the most significant bits.at n=7A263117
• T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with each row and column not divisible by 7, read as a binary number with top and left being the most significant bits.at n=8A263117
• Numerator of sum of reciprocals of all prime divisors of all positive integers <= n.at n=14A380314
• Prime numbersat n=16904