2674688

Appears in sequences

• Expansion of (1-x)/(1-2*x+2*x^2-2*x^3).at n=37A078003
• Expansion of x/(1 - 4*x^2 - 4*x^3).at n=19A099462
• (1,3)-entry of the 3 X 3 matrix M^n, where M = {{0, -1, 1}, {1, 1, 0}, {0, 1, 1}}.at n=38A122788