538020

Appears in sequences

• Number of nonintersecting (or self-avoiding) rook paths joining opposite corners of 3 X n board.at n=11A006192
• Numbers whose set of base 14 digits is {0,1}.at n=36A033050
• Number of n X 7 0..1 arrays avoiding 0 0 0 and 1 1 1 horizontally and 0 0 1 and 1 0 1 vertically.at n=15A208378
• Expansion of e.g.f. 1/(1 + (log(1 - x^2))/x)^3.at n=7A375807