234250

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=29A031619
• A linear combination of Eulerian numbers (A008292) and Pascal's triangle (A007318); t(n,m)=(3*A008292(n,m)-A007318(n,m))/2.at n=40A141691
• Number of zig-zag paths from top to bottom of a rectangle of width 9 with n rows.at n=16A153362