A280784 Triangle read by rows: numbers of nonintersecting circles with one of them marked.

1, 2, 1, 5, 3, 1, 13, 9, 3, 1, 35, 26, 10, 3, 1, 95, 75, 30, 10, 3, 1, 262, 214, 91, 31, 10, 3, 1, 727, 612, 268, 95, 31, 10, 3, 1, 2033, 1747, 790, 284, 96, 31, 10, 3, 1, 5714, 4995, 2308, 848, 288, 96, 31, 10, 3, 1, 16136, 14294, 6737, 2506, 864, 289, 96, 31, 10, 3, 1

Offset: 1

Author

N. J. A. Sloane, Jan 20 2017

Keywords

• nonn
• tabl

Examples

			Triangle begins:
1,
2,1,
5,3,1,
13,9,3,1,
35,26,10,3,1,
95,75,30,10,3,1,
262,214,91,31,10,3,1,
727,612,268,95,31,10,3,1,
2033,1747,790,284,96,31,10,3,1,
...
		

Links

• R. J. Mathar, Topologically Distinct Sets of Non-intersecting Circles in the Plane, arXiv:1603.00077 [math.CO], 2016.

Crossrefs

Rows sums are A000243.