267306

Appears in sequences

• Expansion of (1-x)^(-1)/(1-x+x^2+2*x^3).at n=28A077873
• Number of -3..3 arrays x(i) of n+1 elements i=1..n+1 with set{t,u,v in 0,1}((x[i+t]+x[j+u]+x[k+v])*(-1)^(t+u+v)) having two, four, five or six distinct values for every i,j,k<=n.at n=8A211732