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A055066 Number of 7-covers of an n-set. 6
7, 62, 664, 8609, 127415, 2004975, 31500927, 474504448, 6708348262, 88249739792, 1078567590128, 12269901302433, 130370516668917, 1298891291366245, 12182760243381355, 107979270564656625 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..16.

Vladeta Jovovic, Binary matrices up to row and column permutations

CROSSREFS

Cf. A005748, A005785, A005786.

Sequence in context: A287481 A289212 A060005 * A216534 A167550 A304895

Adjacent sequences:  A055063 A055064 A055065 * A055067 A055068 A055069

KEYWORD

nonn

AUTHOR

Vladeta Jovovic, Jun 12 2000

STATUS

approved

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Last modified October 1 03:36 EDT 2020. Contains 337441 sequences. (Running on oeis4.)