64066

Appears in sequences

• Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 3 ones in any 4 X 4 X 4 subtriangle.at n=5A153923
• a(n) = Sum_{k=0..n} binomial(n,k)^(n+k).at n=4A206152
• Number of 0..n arrays of length 4 with 0 never adjacent to n.at n=14A212837
• a(n) = A273059(4n+1).at n=44A275917
• G.f.: Product_{m>0} (1 + x^m + 2!*x^(2*m) + 3!*x^(3*m)).at n=34A289485