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A360043
Number of edges in a Farey fan of order n.
2
4, 9, 18, 30, 52, 74, 112, 154, 210, 268, 352, 436, 552, 668, 802, 948, 1134, 1316, 1546, 1778, 2038, 2306, 2630, 2952, 3326, 3704, 4124, 4556, 5060, 5552, 6126, 6710, 7338, 7978, 8674, 9376, 10174, 10972, 11824, 12692, 13664, 14620, 15690, 16768, 17898, 19048, 20314, 21574, 22944, 24312
OFFSET
1,1
COMMENTS
See the reference for the definition of a 'Farey fan'. See A360042 and A360044 for further details and images of the graph.
REFERENCES
McIlroy, M. D. "A Note on Discrete Representation of Lines". AT&T Technical Journal, 64 (1985), 481-490.
CROSSREFS
Cf. A005598 (regions), A360042 (vertices), A360044 (k-gons), A005728, A174030, A359976, A359970, A359693.
Sequence in context: A299274 A111384 A196039 * A238091 A301017 A008219
KEYWORD
nonn
STATUS
approved