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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 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS See A371253 and A371254 for images of the circles. LINKS Table of n, a(n) for n=1..40. 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 Adjacent sequences: A371252 A371253 A371254 * A371256 A371257 A371258 KEYWORD nonn AUTHOR Scott R. Shannon, Mar 16 2024 STATUS approved

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Last modified August 6 16:43 EDT 2024. Contains 374980 sequences. (Running on oeis4.)