login
Number of intersections after n-th stage in the structure mentioned in A210606 using semicircumferences and counting the superposed intersections only once.
2

%I #24 Apr 10 2014 00:15:34

%S 0,0,0,1,1,1,1,2,2,3,3,4,4,5,5,6,6,6,6,7,7,8,14,21,27

%N Number of intersections after n-th stage in the structure mentioned in A210606 using semicircumferences and counting the superposed intersections only once.

%C The structure mentioned in A210606 is a model for the visualization of Recamán's sequence A005132.

%C First differs from A210608 at a(24).

%H <a href="/index/Rea#Recaman">Index entries for sequences related to Recamán's sequence</a>

%Y Cf. A005132, A064289, A119632, A160356, A160357, A171175, A171178, A210606, A210607, A210608, A210610-A210613.

%K nonn,hard,more

%O 1,8

%A _Omar E. Pol_, Mar 25 2012