Number of partitions of n concentric circles on the 2-sphere which are realizable by surfaces in the 3-ball.
A186952
Number of partitions of n concentric circles on the 2-sphere which are realizable by surfaces in the 3-ball.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =9a(5) =20a(6) =48a(7) =113a(8) =282a(9) =689a(10) =1767a(11) =4435a(12) =11616a(13) =29775a(14) =79352a(15) =206960a(16) =559906
External references
- oeis: A186952