OFFSET
1,1
LINKS
R. H. Hardin and Vaclav Kotesovec, Table of n, a(n) for n = 1..30
V. Kotesovec, Non-attacking chess pieces, 6ed, 2013, p. 69-71.
EXAMPLE
Neighbors for n=4 (dots represent spaces):
. o--o--o--o
...\/ \/ \/
.../\ /\ /\
. o--o--o--o
...\/ \/ \/
.../\ /\ /\
. o--o--o--o
...\/ \/ \/
.../\ /\ /\
. o--o--o--o
CROSSREFS
Cf. circle A000204, line A000045, arrays: ne-sw nw-se A067965, n-s nw-se A067964, e-w n-s nw-se A066864, e-w ne-sw n-s nw-se A063443, n-s A067966, e-w n-s A006506, nw-se A067962, toruses: bare A002416, ne-sw nw-se A067960, ne-sw n-s nw-se A067959, e-w ne-sw n-s nw-se A067958, n-s A067961, e-w n-s A027683, e-w ne-sw n-s A066866.
Diagonal of A228683
KEYWORD
nonn,nice,hard
AUTHOR
R. H. Hardin, Feb 02 2002
EXTENSIONS
Terms a(15)-a(19) from Vaclav Kotesovec, May 01 2012
STATUS
approved