2820264810

Appears in sequences

• Constant term of the reduction of the polynomial p(n,x)=(1/2)((x+2)^n+(x-2)^n) by x^2->x+2.at n=17A192355
• Expansion of x^2*(1-x)^3/((1-2*x)*(1-x+x^2)*(1-3*x+3x^2)).at n=34A227430
• Number of (n+1) X (1+1) 0..3 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing x(i,j)+x(i-1,j) in the j direction.at n=12A250870
• Number of achiral color patterns (set partitions) for a row or loop of length n using exactly 4 colors (sets).at n=33A304974