242425

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 51.at n=11A031639
• Related to the Herschel graph.at n=6A099913
• Number of n X 3 0..1 arrays with rows, antidiagonals and columns unimodal.at n=11A223632
• Expansion of 1/((1+x)*(1+2*x)*(1-3*x)).at n=12A249992