74571

Appears in sequences

• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 13.at n=23A031691
• Triangle read by rows: T(0,0)=1; for n >= 1 T(n,k) is the coefficient of x^k in the monic characteristic polynomial of the tridiagonal n X n matrix with main diagonal 5,5,5,... and sub- and superdiagonals 1,1,1,... (0 <= k <= n).at n=50A123967
• a(n) = 169*n^2 + 2*n.at n=20A158220
• Least number having n orderless representations as p^2 + q^2 + r^2, where p, q, and r are primes.at n=31A214512