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A335129 a(n) is the number of distinct lines created inside an n-gon when connecting vertex k to vertex 2k mod n. 3
0, 1, 2, 2, 4, 5, 5, 7, 8, 8, 10, 11, 11, 13, 14, 14, 16, 17, 17, 19, 20, 20, 22, 23, 23, 25, 26, 26, 28, 29, 29, 31, 32, 32, 34, 35, 35, 37, 38, 38, 40, 41, 41, 43, 44, 44, 46, 47, 47, 49, 50, 50, 52, 53, 53, 55, 56, 56, 58, 59, 59, 61, 62, 62, 64, 65, 65 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,3

COMMENTS

See A335057 for illustrations.

LINKS

Table of n, a(n) for n=3..69.

FORMULA

a(n) = n - 3 - A079978(n).

CROSSREFS

Cf. A335057 (regions), A335058 (edges), A335059 (vertices).

Sequence in context: A118003 A159296 A277191 * A035632 A114701 A325260

Adjacent sequences:  A335126 A335127 A335128 * A335130 A335131 A335132

KEYWORD

nonn

AUTHOR

Lars Blomberg, May 24 2020

STATUS

approved

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Last modified July 28 23:26 EDT 2021. Contains 346340 sequences. (Running on oeis4.)