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A371255
Number of (curved) edges formed when n equally spaced points are placed around a circle and all pairs of points are joined by an interior arc whose radius equals the circle's radius.
5
1, 2, 9, 8, 40, 24, 168, 152, 477, 490, 1199, 912, 2418, 2464, 4230, 4464, 7769, 6894, 12369, 12400, 18606, 19008, 27784, 26376, 39575, 39390, 54027, 54432, 73254, 68340, 96410, 96800, 124443, 125222, 159005, 156168, 200540, 201932, 248508, 250120
OFFSET
1,2
COMMENTS
See A371253 and A371254 for images of the circles.
FORMULA
a(n) = A371253(n) + A371254(n) - 1 by Euler's formula.
CROSSREFS
Cf. A371253 (regions), A371254 (vertices), A371274 (k-gons), A135565, A358783, A359047, A359254.
Sequence in context: A129194 A300780 A272347 * A214300 A092397 A272348
KEYWORD
nonn
AUTHOR
Scott R. Shannon, Mar 16 2024
STATUS
approved