cp's OEIS Frontend

A089480 Triangle T(n,k) read by rows, where T(n,k) = number of times the permanent of a real nonsingular n X n (0,1)-matrix takes the value k, for n >= 1, 1 <= k <= A000255(n).

%I A089480 #4 Mar 31 2012 14:40:20
%S A089480 1,6,150,6,18,13032,1440,4992,672,1440,288,576,0,24,0,96,3513720,
%T A089480 693840,2626800,604200,1451400,468000,962400,252000,425400,190800,
%U A089480 379200,97200,205440,100800,132000,28800,108000,28800,44400,33600,61200,9600,14400,0
%N A089480 Triangle T(n,k) read by rows, where T(n,k) = number of times the permanent of a real nonsingular n X n (0,1)-matrix takes the value k, for n >= 1, 1 <= k <= A000255(n).
%C A089480 This sequence was first provided by _Jaap Spies_.
%Y A089480 T(n, A000255(n)) = A052655(n). The n-th row of the table contains A089475(n) nonzero entries. Cf. A089479 occurrence counts for permanents of all (0, 1)-matrices, A089481 occurrence counts for permanents of singular (0, 1)-matrices.
%K A089480 nonn,tabf
%O A089480 1,2
%A A089480 _Hugo Pfoertner_, Nov 04 2003