479779

Appears in sequences

• Expansion of (1-x)/(1-x-2*x^2+x^3).at n=24A052547
• Number of Catalan paths (nonnegative, starting and ending at 0, step +/-1) of 2*n steps with all values <= 5.at n=13A080937
• Number of walks of length n on P_3 plus a loop at the end.at n=26A096976
• Let i be in {1,2,3} and let r >= 0 be an integer. Let p = {p_1, p_2, p_3} = {-2,0,1}, n=2*r+p_i, and define a(-2)=1. Then, a(n)=a(2*r+p_i) gives the quantity of H_(7,1,0) tiles in a subdivided H_(7,i,r) tile after linear scaling by the factor x^r, where x=sqrt(2*cos(Pi/7)).at n=50A187065
• Number of non-equivalent binary n X n matrices with three pairwise nonadjacent 1's.at n=15A232568
• a(n) = a(n-1) + a(n-2) if n is even and a(n) = a(n-3) + a(n-4) if n is odd, with a(0) = a(1) = a(2) = 0 and a(3) = 1.at n=51A265755