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A332607 Number of quadrilaterals 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). 6
2, 8, 36, 92, 194, 336, 554, 812, 1314, 1756, 2508, 3252, 4348, 5464, 7054, 8760, 11050, 13324, 16162, 19256, 23188, 27120, 32098, 37396, 43456, 49516, 57608, 65440, 74670, 84388, 95674, 107656, 120990, 133996, 150144, 166424, 185090, 203960, 224926, 247120 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
See A331452 (the illustrations for T(n,2)) for pictures of these graphs.
LINKS
CROSSREFS
Sequence in context: A203762 A185635 A076122 * A236626 A355102 A355104
KEYWORD
nonn
AUTHOR
EXTENSIONS
a(21) and beyond from Lars Blomberg, Apr 28 2020
STATUS
approved

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Last modified June 22 15:32 EDT 2024. Contains 373587 sequences. (Running on oeis4.)