
COMMENTS

See A210109 for further information.
It appears that A027377 gives the number of 2divided words that have a unique division into two parts.  David Scambler, Mar 21 2012
Row sums of the following table which shows how many words of length n over a 4letter alphabet are 2divided in k>=1 different ways:
6;
20, 20;
60, 66, 60;
204, 204, 204, 204;
670, 690, 676, 690, 670;
2340, 2340, 2340, 2340, 2340, 2340;
8160, 8220, 8160, 8226, 8160, 8220, 8160;
First column of the following triangle which shows how many words of length n over a 4letter alphabet are kdivided:
6;
40, 4;
186, 60, 1;
816, 374, 44, 0;
3396, 1960, 450, 12, 0;
14040, 9103, 3175, 275, 0, 0;
57306, 40497, 17977, 2915, 66, 0, 0;
233000, 174127, 91326, 22243, 1318,..
 R. J. Mathar, Mar 25 2012
