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Number of edge-disjoint paths between opposite corners of n X n grid.
5

%I #9 Sep 24 2018 02:02:30

%S 1,1,2,16,800,323632,1086297184,30766606427588,7466577706821521924,

%T 15681997226277809235573754,286995508313697459220070082104780,

%U 45988915870193885369543805313062149050276

%N Number of edge-disjoint paths between opposite corners of n X n grid.

%D rec.puzzles Dec 10 1995

%Y Cf. A013991, A013992, A013993, A013994, A013995, A013996, A013997.

%K nonn,hard

%O 0,3

%A _Dan Hoey_

%E a(10) and a(11) from _Sean A. Irvine_, Sep 24 2018