60284

Appears in sequences

• Triangle of coefficients of polynomials P(n; x) = Permanent(M), where M=[m(i,j)] is n X n matrix defined by m(i,j)=x if 0<=i-j<=2 else m(i,j)=1.at n=49A080061
• Walks of length n on the x-axis using steps {1,0,-1} and visiting no point more than twice.at n=13A212587