A225681 - OEIS

%I #10 May 25 2013 21:21:51

%S 0,0,0,0,0,0,0,0,4,24,92,292,850,2276,5766,13968,32690,74368,165442,

%T 361104,776116,1646566,3456030,7189232,14844878,30464914

%N Number of binary words of length n that are not rich.

%H Amy Glen, Jacques Justin, Steve Widmer and Luca Q. Zamboni, <a href="http://arxiv.org/abs/0801.1656v3">Palindromic richness</a>, arXiv:0801.1656 [math.CO]

%F 2^n - A216264(n).

%Y Cf. A216264.

%K nonn,more

%O 0,9

%A _N. J. A. Sloane_, May 16 2013