%I #8 Oct 15 2012 23:18:08
%S 0,0,1,2,4,7,16,30,63,122,251,495,1003,1990,4012,7992,16043,32024,
%T 64173,128226,256692,513131,1026765,2053034,4107060,8213109,16428221,
%U 32854454,65712883,131421763,262851530,525695069,1051406116
%N Number of sequences of n 2's and 3's with curling number 2, which have the form XY^2 with Y = 2, and which are robust.
%C Let S be a sequence of n 2's and 3's with curling number 2 and which has the form XY^2 with Y = 2. S is robust if no proper suffix of S^3 has curling number > 2.
%H <a href="/index/Cu#curling_numbers">Index entries for sequences related to curling numbers</a>
%Y Cf. A217832, A217930.
%K nonn
%O 1,4
%A _N. J. A. Sloane_, Oct 15 2012