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).

1, 6, 150, 6, 18, 13032, 1440, 4992, 672, 1440, 288, 576, 0, 24, 0, 96, 3513720, 693840, 2626800, 604200, 1451400, 468000, 962400, 252000, 425400, 190800, 379200, 97200, 205440, 100800, 132000, 28800, 108000, 28800, 44400, 33600, 61200, 9600, 14400, 0

Offset

1,2

Comments

This sequence was first provided by Jaap Spies.

Links

Table of n, a(n) for n=1..40.

Crossrefs

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.

Sequence in context: A012791 A347842 A264645 * A056427 A056418 A346694

Adjacent sequences: A089477 A089478 A089479 * A089481 A089482 A089483

Keyword

nonn,tabf

Author

Hugo Pfoertner, Nov 04 2003

Status

approved