A372682 Number of distinct circles that can be constructed from the 3 vertices and the equally spaced 3*n points placed on the sides of an equilateral triangle, using only a compass.

3, 15, 36, 69, 123, 180, 264, 339, 453, 549, 702, 807, 999, 1128, 1329, 1494, 1749, 1935, 2214, 2373, 2682, 2940, 3288, 3483

Offset

0,1

Comments

See A372614 for images of the circles.

Links

Table of n, a(n) for n=0..23.

Crossrefs

Cf. A372614, A372615, A359931, A360350, A361622, A365669.

Sequence in context: A161738 A062741 A185541 * A176661 A117561 A353679

Adjacent sequences: A372679 A372680 A372681 * A372683 A372684 A372685

Keyword

nonn,more

Author

Scott R. Shannon, May 10 2024

Status

approved