46895

Appears in sequences

• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 25 ones.at n=31A031793
• a(1) = a(2) = 1, a(n) = A007947(a(n-1)) + a(n-2), for n >= 3, i.e., a(n) = a(n-2) plus the largest squarefree divisor of a(n-1).at n=28A121368
• Number of additive cyclic codes over GF(4) of length n.at n=11A143695
• a(1) = 1; a(n) = -Sum_{k=1..n} a(k/gcd(n,k)).at n=38A343762