122581

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 77.at n=3A031665
• Number of 2 X 2 matrices having all terms in {-n,...,0,...,n} and 0 <= determinant <= n.at n=19A211146
• The average Wiener index of the set of all fibonacenes with n hexagons.at n=27A245969