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A332608 Number of pentagons in the graph formed by drawing the lines connecting any two of the 2*(n+2) perimeter points of a 3 X (n+1) rectangular grid of points (or equally, a 2 X n grid of squares). 4
0, 0, 4, 12, 24, 28, 80, 128, 112, 200, 236, 356, 472, 652, 656, 940, 1040, 1300, 1600, 1948, 2048, 2588, 2856, 3260, 3716, 4492, 4572, 5324, 5904, 6508, 7200, 8144, 8664, 10296, 10548, 11664, 12580, 13860, 14596, 15980, 17312, 18516, 19692, 22152, 22912 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
COMMENTS
See A331452 (the illustrations for T(n,2)) for pictures of these graphs.
LINKS
CROSSREFS
Sequence in context: A274187 A353991 A286040 * A177464 A316985 A353789
KEYWORD
nonn
AUTHOR
EXTENSIONS
a(21) and beyond from Lars Blomberg, Apr 28 2020
STATUS
approved

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Last modified June 12 18:11 EDT 2024. Contains 373359 sequences. (Running on oeis4.)