13741728

Appears in sequences

• a(n) = binomial(n+6,6)*binomial(n+9,6).at n=7A105942
• a(n) = binomial(n+7,7) * binomial(n+10,10).at n=6A107422
• Number of 4Xn 0..1 arrays avoiding 0 0 1 and 0 1 1 horizontally and 0 0 1 and 1 0 1 vertically.at n=20A208143