OFFSET
1,2
COMMENTS
Terms for rhombic- and staggered- hexagonal arrays are the same for n in 1..4.
LINKS
Andrew Howroyd, Table of n, a(n) for n = 1..16
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 24 2002
EXTENSIONS
a(9) from Alois P. Heinz, May 02 2012
a(10)-a(14) from Andrew Howroyd, Jun 25 2017
STATUS
approved