31691

Appears in sequences

• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 0, 1), (0, 1, -1), (1, -1, 0), (1, 0, 0)}.at n=11A148111
• a(n) = ((3+2*sqrt(2))*(5+sqrt(2))^n + (3-2*sqrt(2))*(5-sqrt(2))^n)/2.at n=5A163605
• Expansion of 1/(1 - x - x^5 + x^6 - x^7 - x^11 + x^12).at n=42A225500
• G.f. A(x) satisfies: A(x)^2 - 4*A(x)^3 = A(x^2).at n=6A274736