%I

%S 0,2,40,584,1695296

%N Number of nonsingular n X n real {0,1}-matrices such that all upper left i X i submatrices are singular for i = 1..n-1.

%Y Cf. A125587, A125593, A127182, A127183.

%K nonn

%O 1,2

%A _Artur Jasinski_, Jan 08 2007