Number of n X n binary matrices with no 2 adjacent 1's, or configurations of non-attacking princes on an n X n board, where a "prince" attacks the four adjacent (non-diagonal) squares. Also number of independent sets of vertices in an n X n grid.
2, 7, 63, 1234, 55447, 5598861, 1280128950, 660647962955, 770548397261707
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12 seqfan posts
Sat Jun 25 01:08:14 CEST 2011 [seqfan] Re: Program syntax and the OEIS
Sat Jun 25 00:45:27 CEST 2011 [seqfan] Re: Program syntax and the OEIS
Fri Jun 24 21:41:39 CEST 2011 [seqfan] Re: Program syntax and the OEIS
Fri Jun 24 17:22:21 CEST 2011 [seqfan] Re: Program syntax and the OEIS
Fri Jun 24 07:05:18 CEST 2011 [seqfan] Program syntax and the OEIS
Fri Jun 17 20:27:13 CEST 2011 [seqfan] Re: can anyone extend A006506?
Fri Jun 17 13:03:33 CEST 2011 [seqfan] Re: can anyone extend A006506?
Thu Jun 16 21:34:43 CEST 2011 [seqfan] Re: can anyone extend A006506?
Thu Jun 16 16:10:36 CEST 2011 [seqfan] Re: can anyone extend A006506?
Thu Jun 16 16:10:36 CEST 2011 [seqfan] Re: can anyone extend A006506?
Thu Jun 16 09:13:08 CEST 2011 [seqfan] Re: can anyone extend A006506?
Thu Jun 16 07:16:35 CEST 2011 [seqfan] can anyone extend A006506?
Index of A-numbers in seqfan: by ascending order
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by frequency
by keyword
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