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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 not robust.
2

%I #6 Oct 15 2012 23:18:23

%S 0,1,0,0,0,1,0,2,0,4,1,7,1,18,0,32,5,65,5,130,4,261,19,504,16,1043,20,

%T 2028,81,4043,82,8155,81

%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 not 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, A217929.

%K nonn

%O 1,8

%A _N. J. A. Sloane_, Oct 15 2012