OFFSET
0,4
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..257
PROG
(PARI) a(n) = matdet(matrix(n, n, i, j, hammingweight(i+j-2) % 2)); \\ Michel Marcus, Apr 13 2020
CROSSREFS
KEYWORD
sign,look
AUTHOR
Jeffrey Shallit, Sep 04 2000
EXTENSIONS
More terms from Alois P. Heinz, May 25 2013
STATUS
approved