A297205 Array read by antidiagonals: T(m,n) = number of edge covers in the m X n king graph.

0, 1, 1, 1, 41, 1, 2, 1201, 1201, 2, 3, 36281, 559647, 36281, 3, 5, 1094401, 268870883, 268870883, 1094401, 5, 8, 33014921, 129026029705, 2058903341490, 129026029705, 33014921, 8, 13, 995960401, 61919807546309, 15748005991643285, 15748005991643285, 61919807546309, 995960401, 13

Offset: 1

Author

Andrew Howroyd, Dec 26 2017

Keywords

• nonn
• tabl

Examples

			Array begins:
========================================================================
m\n| 1       2            3                 4                      5
---|--------------------------------------------------------------------
1  | 0       1            1                 2                      3 ...
2  | 1      41         1201             36281                1094401 ...
3  | 1    1201       559647         268870883           129026029705 ...
4  | 2   36281    268870883     2058903341490      15748005991643285 ...
5  | 3 1094401 129026029705 15748005991643285 1919822469194024912961 ...
...
		

Links

• Eric Weisstein's World of Mathematics, Edge Cover
• Eric Weisstein's World of Mathematics, King Graph

Crossrefs

Main diagonal is A297056.

Cf. A286912.