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A254152 Number of independent sets in generalized Aztec diamond E(L_9,L_{2m-1}). 2
1, 32, 1351, 62501, 2976416, 142999897, 6888568813, 332097693792, 16014193762579, 772279980131297, 37243762479698920, 1796118644459454976 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

E(L_9,L_{2m-1}) is the graph with vertices {(a,b) : 1<=a<=9, 1<=b<=2n-1, a+b even} and edges between (a,b) and (c,d) if and only if |a-b|=|c-d|=1.

LINKS

Table of n, a(n) for n=0..11.

Z. Zhang, Merrifield-Simmons index of generalized Aztec diamond and related graphs, MATCH Commun. Math. Comput. Chem. 56 (2006) 625-636.

CROSSREFS

Cf. A254124, A254125, A254126, A254150, A254151.

Sequence in context: A274732 A241800 A231040 * A160447 A302263 A302963

Adjacent sequences:  A254149 A254150 A254151 * A254153 A254154 A254155

KEYWORD

nonn

AUTHOR

Steve Butler, Jan 26 2015

STATUS

approved

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Last modified September 21 00:17 EDT 2019. Contains 327252 sequences. (Running on oeis4.)