35808

Appears in sequences

• Number of length 3 walks on an n-dimensional hypercubic lattice starting at the origin and staying in the nonnegative part.at n=32A064043
• Square array read by antidiagonals: T(n,k)=T(n,k-1)*n^2/(n-1)-Catalan(k-1) with a(n,1)=n-1 and a(1,k)=0 where Catalan(k)=C(2k,k)/(k+1)=A000108(k).at n=49A067346
• Expansion of x/(sqrt(1-4*x^2) + x - 1).at n=12A100087
• Expansion of (1+sqrt(1-4*x))/(5*sqrt(1-4*x)-3).at n=6A104531
• Number of nondecreasing arrangements of n numbers x(i) in -(n-1)..(n-1) with the sum of sign(x(i))*x(i)^2 zero.at n=9A187994
• T(n,k)=Number of nondecreasing arrangements of n numbers x(i) in -(n+k-2)..(n+k-2) with the sum of sign(x(i))*x(i)^2 zero.at n=54A188002