68833

Appears in sequences

• Denominators of continued fraction convergents to sqrt(7).at n=17A041009
• Numbers k such that 7*k^2 = floor(k*sqrt(7)*ceiling(k*sqrt(7))).at n=8A084069
• The general form of the recurrences are the a(j), b(j) and n(j) solutions of the 2-equation problem 7*n(j) + 1 = a(j)*a(j) and 9*n(j) + 1 = b(j)*b(j) with positive integer numbers.at n=4A159678
• Square root of floor[A055859(n)/7].at n=15A204517
• Denominators of the other-side convergents to sqrt(7).at n=16A259596
• Number of unlabeled lone-child-avoiding rooted trees with n vertices and more than two branches (of the root).at n=21A331488