274288

Appears in sequences

• Number of n X 7 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 1 1 0 vertically.at n=7A207304
• a(n) = [x^n] (1/(1 - x))*Product_{k>=1} (1 + n*x^k).at n=13A304782