706401

Appears in sequences

• First row of spectral array W(sqrt(3/2)).at n=15A022163
• Expansion of 1/(1-3x+3x^3) in powers of x.at n=14A090400
• Number of ways of filling a 2 X 3 X 2n hole with 1 X 2 X 2 bricks.at n=8A158869
• a(n) = 3^(floor(n/2))+3^(floor(n/2)-1)-3^(floor((n-1)/3)).at n=22A170832