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A269110
Numbers of unit circles packed in a triangle of smallest area admitting an equilateral triangle solution.
3
1, 3, 5, 6, 9, 10, 14, 15, 20, 21
OFFSET
1,2
CROSSREFS
May be related to A117142.
For packing into equilateral triangles, see A337019.
Sequence in context: A112649 A050083 A081175 * A182050 A094598 A367334
KEYWORD
nonn,hard,more
AUTHOR
Leonid Broukhis, Feb 19 2016
STATUS
approved