A280785 - OEIS

%I #9 May 01 2020 07:56:38

%S 1,1,1,2,2,1,5,5,2,1,13,13,6,2,1,35,35,16,6,2,1,95,95,46,17,6,2,1,262,

%T 262,128,49,17,6,2,1,727,727,364,139,50,17,6,2,1,2033,2033,1029,401,

%U 142,50,17,6,2,1,5714,5714,2930,1147,412,143,50,17,6,2,1,16136,16136,8344,3299,1184,415,143,50,17,6,2,1

%N Triangle read by rows: numbers of nonintersecting circles, one marked.

%H R. J. Mathar, <a href="http://arxiv.org/abs/1603.00077">Topologically Distinct Sets of Non-intersecting Circles in the Plane</a>, arXiv:1603.00077 [math.CO], 2016.

%e Triangle begins:

%e 1,

%e 1,1,

%e 2,2,1,

%e 5,5,2,1,

%e 13,13,6,2,1,

%e 35,35,16,6,2,1,

%e 95,95,46,17,6,2,1,

%e 262,262,128,49,17,6,2,1,

%e 727,727,364,139,50,17,6,2,1,

%e ...

%Y Row sums are A000107.

%K nonn,tabl

%O 1,4

%A _N. J. A. Sloane_, Jan 20 2017