30397

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 31.at n=4A031619
• Denominators of continued fraction convergents to sqrt(279).at n=12A041525
• Number of nonnegative solutions to x^2 + y^2 + z^2 < n^2.at n=38A218711
• Molien series for invariants of finite Coxeter group A_12.at n=56A266781
• a(n) = Sum_{k=1..n} (k/gcd(n, k))^3.at n=23A343513
• Numbers k such that A361338(k) = 10.at n=8A361349
• Number of distinct determinants of 3 X 3 matrices with entries from {0, 1, ..., n}.at n=21A366158