OFFSET
1,2
COMMENTS
Column 4 of A180803
LINKS
R. H. Hardin, Table of n, a(n) for n=1..376
EXAMPLE
Solutions for sum of products of 4 0..1 pairs = 0 (mod 2) are
(0*0 + 0*0 + 0*0 + 0*0) (0*0 + 0*0 + 0*0 + 0*1) (0*0 + 0*0 + 0*1 + 0*1)
(0*0 + 0*0 + 1*1 + 1*1) (0*0 + 0*1 + 0*1 + 0*1) (0*0 + 0*1 + 1*1 + 1*1)
(0*1 + 0*1 + 0*1 + 0*1) (0*1 + 0*1 + 1*1 + 1*1) (1*1 + 1*1 + 1*1 + 1*1)
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, suggested by Max Alekseyev in the Sequence Fans Mailing List, Sep 20 2010
STATUS
approved