Number of nXn binary arrays with all 1s connected, a path of 1s from upper left corner to lower right corner, and no 1 having more than two 1s adjacent
1, 3, 17, 132, 1561, 27874, 80924
1 seqfan posts
Mon Aug 3 23:11:35 CEST 2009 [seqfan] Re: LRS formulas for n>=...?