90741

Appears in sequences

• a(n) = Sum_{k <= n/2 } binomial(n-2k, 3k).at n=24A137356
• 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, 0, 0), (0, -1, 1), (1, 0, 1), (1, 1, -1), (1, 1, 1)}.at n=8A151002
• Number of (n+1) X (1+1) arrays of permutations of 0..n*2+1 with each element having directed index change -2,0 -1,0 0,-1 or 1,1.at n=34A264622
• Expansion of 1/(1 - x^3/(1-x)^5).at n=15A369804
• a(n) = Sum_{k=0..floor(2*n/5)} binomial(2*n-2*k,3*k).at n=12A392401
• a(n) = Sum_{k=0..floor(2*n/3)} binomial(2*k,2*n-3*k).at n=18A392428