2354637

Appears in sequences

• Expansion of g.f. x^2*(1+4*x-3*x^2)/((1-x)^2*(1-2*x)*(1-3*x)).at n=13A187693
• Number of (2+1) X (n+1) 0..1 arrays with no 2 X 2 subblock having x11-x00 less than x10-x01.at n=14A251269