OFFSET
1,3
LINKS
E. N. Gilbert, Latin squares which contain no repeated digrams, SIAM Rev. 7 1965 189--198. MR0179095 (31 #3346).
K. Haymaker and B. Malmskog, What (quilting) circles can be squared?, preprint 2017, to appear in Mathematics Magazine.
Beth Malmskog, Python Code to Compute Sequence
PROG
(Python) # See Malmskog link.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Beth Malmskog, May 01 2019
STATUS
approved