1700580

Appears in sequences

• Triangle T(n,k) defined by Sum_{1<=k<=n} T(n,k)*u^k*t^n/n! = exp(((1-t)*(1-t^2)*(1-t^3)...)^(-u)-1).at n=30A066045
• Number of n X n 0..2 arrays with every element neighboring horizontally or vertically both a 0 and a 1.at n=4A203535
• Number of n X 5 0..2 arrays with every element neighboring horizontally or vertically both a 0 and a 1.at n=4A203539
• T(n,k)=Number of nXk 0..2 arrays with every element neighboring horizontally or vertically both a 0 and a 1.at n=40A203542