195026

Appears in sequences

• Expansion of (2-3*x-x^2)/((1-x)*(1-2*x-x^2)).at n=14A052937
• Expansion of (1+x)*(2*x-1)/((1-x)*(x^2+2*x-1)).at n=15A174191
• Number of ways to place 2 nonattacking nightriders on an n X n toroidal board.at n=25A196812