A281345 Related to enumeration of sets of non-intersecting circles in the plane.

1, 2, 8, 26, 99, 364, 1417, 5541, 22193, 89799, 368160, 1523020, 6355895, 26713307, 112999390, 480666202, 2054863538, 8823764846, 38042350806, 164609190230, 714613926565, 3111673137244, 13586653421083, 59474496929094, 260953934483595, 1147456294303011, 5055688301028252, 22317001824137254

Offset

0,2

Comments

Needs a more precise definition.

Links

Table of n, a(n) for n=0..27.

R. J. Mathar, Topologically Distinct Sets of Non-intersecting Circles in the Plane, arXiv:1603.00077 [math.CO], 2016. See (101).

Crossrefs

Sequence in context: A301699 A129368 A357221 * A348240 A128238 A110156

Adjacent sequences: A281342 A281343 A281344 * A281346 A281347 A281348

Keyword

nonn

Author

N. J. A. Sloane, Jan 20 2017

Status

approved