OFFSET
1,2
LINKS
R. J. Mathar, Topologically Distinct Sets of Non-intersecting Circles in the Plane, arXiv:1603.00077 [math.CO], 2016.
EXAMPLE
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,
...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
N. J. A. Sloane, Jan 20 2017
STATUS
approved