OFFSET
1,2
COMMENTS
Cover may include multiple occurrences of a subset. Also n-rowed binary matrices with distinct rows and all row sums 4.
LINKS
Vladeta Jovovic, Formula
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Vladeta Jovovic, Nov 30 2000
EXTENSIONS
a(8)-a(12) from Andrew Howroyd, Jan 29 2020
a(13)-a(15) from Sean A. Irvine, Aug 26 2022
STATUS
approved