

A359861


Number of edges among all distinct circles that can be constructed from a 2 X n square grid of points using only a compass.


5



4, 84, 420, 1604, 3904, 8444, 15524, 27356, 43540, 67720, 99088, 142912, 196820, 267580, 352844, 460432, 586592, 741852
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OFFSET

1,1


COMMENTS

See A359859 and A359860 for further details and images of the circles. No formula for a(n) is known.


LINKS



EXAMPLE



CROSSREFS



KEYWORD

nonn,more


AUTHOR



STATUS

approved



