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A089479 Triangle T(n,k) read by rows, where T(n,k) = number of times the permanent of a real n X n (0,1)-matrix takes the value k, for n >= 1, 0 <= k <= n!. 6
1, 1, 9, 6, 1, 265, 150, 69, 18, 9, 0, 1, 27713, 13032, 10800, 4992, 4254, 1440, 1536, 576, 648, 24, 288, 96, 48, 0, 72, 0, 0, 0, 16, 0, 0, 0, 0, 0, 1, 10363361, 3513720, 4339440, 2626800, 3015450, 1451400, 1872800, 962400, 1295700, 425400, 873000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

The last element of each row is 1, corresponding to the n X n "all 1" matrix with permanent=n!. The first 4 rows were provided by Wouter Meeussen. The 6th row was computed by Gordon F. Royle: 13906734081,2722682160,4513642920,3177532800,4466769300,2396826720,3710999520, 2065521600,3253760550,1468314000,2641593600,1350475200,2210277600,1034061120,...

LINKS

Table of n, a(n) for n=1..48.

CROSSREFS

T(n, 0)=A088672(n), T(n, 1)=A089482(n). The n-th row of the table contains A087983(n) nonzero entries. For n>2 A089477(n) gives the position of the first zero entry in the n-th row. Cf. A089480 occurrence counts for permanents of non-singular (0, 1)-matrices, A089481 occurrence counts for permanents of singular (0, 1)-matrices.

Sequence in context: A220669 A064230 A286331 * A269444 A199431 A154899

Adjacent sequences:  A089476 A089477 A089478 * A089480 A089481 A089482

KEYWORD

nonn,tabf

AUTHOR

Hugo Pfoertner, Nov 05 2003

STATUS

approved

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Last modified November 13 19:25 EST 2018. Contains 317149 sequences. (Running on oeis4.)