a(n) is the (1,2)-entry of the n-th power of the 2 X 2 matrix [0,1;n-1,n-1].

A109516

a(n) is the (1,2)-entry of the n-th power of the 2 X 2 matrix [0,1;n-1,n-1].

Terms

    a(0) =1a(1) =1a(2) =6a(3) =45a(4) =464a(5) =6000a(6) =93528a(7) =1707111a(8) =35721216a(9) =843160671a(10) =22165100000a(11) =642268811184

External references