158904

Appears in sequences

• a(n) = sum along n-th diagonal of A094102 (sloping downward to left).at n=47A094103
• Expansion of (-1+2x+2x^2)/((1+x+x^2)(1-x-x^2)).at n=27A100887
• Number of different possible rows (or columns) in an n X n crossword puzzle.at n=25A130578
• G.f.: exp( Sum_{n>=1} x^n/n * Sum_{k=0..n} binomial(n*k, k^2) ).at n=6A228809