312019

Appears in sequences

• Fourth entry in row n of triangle in A169945.at n=28A169948
• Expansion of (1-3*x+x^2)^2/(1-9*x+28*x^2-35*x^3+15*x^4-x^5).at n=10A216710
• Number of (n+4) X 1 arrays of occupancy after each element moves up to +-4 places including 0.at n=6A222341
• Number of (n+7)X1 arrays of occupancy after each element moves up to +-n places including 0.at n=3A222351
• Number of paths of length n starting at initial node of the path graph P_10.at n=21A336675