A001184 Number of simple Hamiltonian paths connecting opposite corners of a 2n+1 X 2n+1 grid.
1, 2, 104, 111712, 2688307514, 1445778936756068, 17337631013706758184626, 4628650743368437273677525554148, 27478778338807945303765092195103685118924
Offset: 0
Formula
a(n) = A121788(2n), n>0. - Ashutosh Mehra, Dec 19 2008
Extensions
a(7)-a(8) copied from A121788 by Alois P. Heinz, Sep 27 2014