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A055084 Number of 6xn binary matrices with no zero rows or columns, up to row and column permutation. 3
1, 15, 180, 2001, 20755, 200082, 1781941, 14637962, 111011667, 779695050, 5093379110, 31092553357, 178203364143, 963217652830, 4930357535218, 23989343505296, 111335037107474, 494383391324356, 2106346854756098 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..19.

CROSSREFS

Cf. A024206, A055609, A054976, A048291.

Sequence in context: A001717 A293476 A004992 * A005461 A138443 A235455

Adjacent sequences:  A055081 A055082 A055083 * A055085 A055086 A055087

KEYWORD

nonn

AUTHOR

Vladeta Jovovic, Jun 13 2000

STATUS

approved

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Last modified June 15 16:13 EDT 2019. Contains 324142 sequences. (Running on oeis4.)