67554

Appears in sequences

• a(n)=Sum{a(k): k=0,1,2,...,n-3,n-1}; a(n-2) is not a summand; 2 initial terms required.at n=20A049854
• a(n) = Sum_{k=0..n} C(n,3k+2)^2.at n=10A139469
• Expansion of Product_{k>=0} ((1+x^(4*k+1))/(1-x^(4*k+1)))^3.at n=23A261652
• a(n) = a(n-2)+a(n-3) with a(1)=2 a(2)=1 a(3)=0.at n=41A276276
• Number of (undirected) paths in the complete tripartite graph K_{n,n,n}.at n=2A290324