A055901 Column 5 of triangle A055898.

1, 11, 76, 376, 1496, 5032, 14872, 39572, 96607, 219373, 468440, 948640, 1834560, 3407040, 6104736, 10594728, 17868213, 29367063, 47149828, 74105240, 114224968, 172946488, 257581688, 377845468, 546504595, 780165113

Offset

5,2

Links

Table of n, a(n) for n=5..30.

A. J. Guttmann, Indicators of solvability for lattice models, Discrete Math., 217 (2000), 167-189 (H_5 for square lattices of Section 6).

Formula

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).

Crossrefs

Cf. A055898.

Sequence in context: A282384 A092225 A282816 * A036427 A122589 A302382

Adjacent sequences: A055898 A055899 A055900 * A055902 A055903 A055904

Keyword

nonn

Author

Christian G. Bower, Jun 13 2000

Status

approved