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Column 5 of triangle A055898.
2

%I #10 Aug 15 2024 03:32:42

%S 1,11,76,376,1496,5032,14872,39572,96607,219373,468440,948640,1834560,

%T 3407040,6104736,10594728,17868213,29367063,47149828,74105240,

%U 114224968,172946488,257581688,377845468,546504595,780165113

%N Column 5 of triangle A055898.

%H A. J. Guttmann, <a href="https://doi.org/10.1016/S0012-365X(99)00262-9">Indicators of solvability for lattice models</a>, Discrete Math., 217 (2000), 167-189 (H_5 for square lattices of Section 6).

%F G.f.: x^5*(1+4x+16x^2+24x^3+36x^4+24x^5+16x^6+4x^7+x^8)/((1-x)^11*(1+x)^4).

%Y Cf. A055898.

%K nonn

%O 5,2

%A _Christian G. Bower_, Jun 13 2000