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A333459
Number of vertices in an diagonal-edged (or diamond-shaped) checkerboard with width and height 2*n-1 (see Comments in A333434 for definition).
3
5, 69, 785, 4177, 12681, 33601, 71777, 125389, 238801, 379793, 548293, 878397, 1203101, 1673693, 2311477, 3063609, 3934365, 4931077, 6501545, 7873689, 9852941, 12071685, 14067849, 17728005, 20417893, 24047817, 29003717
OFFSET
1,1
COMMENTS
See A333434 for the definition and images of the checkerboard.
CROSSREFS
Cf. A333434 (regions), A333458 (n-gons), A333460 (edges), A333035, A333031, A330850.
Sequence in context: A337951 A092817 A333035 * A362101 A307700 A326435
KEYWORD
nonn,more
AUTHOR
EXTENSIONS
a(8)-a(27) from Lars Blomberg, Jun 03 2020
STATUS
approved