51754

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 30.at n=7A031618
• Nearest integer to (Product(n^((1 + log(1 + i))/i^2), {i, 1, n})).at n=28A062487
• a(n) = n^4 + 5*n^2 + 4.at n=15A156798
• a(n) = (7*n+2)*(7*n+5) = 49*n^2 + 49*n + 10.at n=32A177060
• a(n) = Sum_{k=0..floor(n/3)} binomial(n-2*k-1,k) * binomial(k,n-3*k).at n=31A383583