OFFSET
0,4
COMMENTS
a(n) is the number of binary matrices with n distinct columns and any number of distinct nonzero rows with 3 ones in every column and columns in decreasing lexicographic order. - Andrew Howroyd, Jan 25 2020
LINKS
Andrew Howroyd, Table of n, a(n) for n = 0..100
CROSSREFS
KEYWORD
nonn
AUTHOR
Goran Kilibarda, Vladeta Jovovic, May 15 2004
EXTENSIONS
Terms a(11) and beyond from Andrew Howroyd, Jan 25 2020
STATUS
approved