A269110 Numbers of unit circles packed in a triangle of smallest area admitting an equilateral triangle solution.

1, 3, 5, 6, 9, 10, 14, 15, 20, 21

Offset

1,2

Links

Table of n, a(n) for n=1..10.

Erich Friedman, Circles in Arbitrary Triangles

Crossrefs

May be related to A117142.

For packing into equilateral triangles, see A337019.

Sequence in context: A112649 A050083 A081175 * A182050 A094598 A367334

Adjacent sequences: A269107 A269108 A269109 * A269111 A269112 A269113

Keyword

nonn,hard,more

Author

Leonid Broukhis, Feb 19 2016

Status

approved