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A123844
Number of ways, counted up to symmetry, to build a contiguous building with n LEGO blocks of size 5x5.
0
1, 21, 2365, 315227, 46118229, 7130583024, 1146486080898
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OFFSET
1,2
LINKS
Table of n, a(n) for n=1..7.
M. Abrahamsen and S. Eilers,
On the asymptotic enumeration of LEGO structures
, Exper Math. 20 (2) (2011) 145-152.
B. Durhuus and S. Eilers,
On the entropy of LEGO
, arXiv:math.CO/0504039
CROSSREFS
Sequence in context:
A250062
A219000
A033510
*
A172622
A172675
A068254
Adjacent sequences:
A123841
A123842
A123843
*
A123845
A123846
A123847
KEYWORD
nonn
,
hard
AUTHOR
Søren Eilers
, Oct 29 2006
STATUS
approved
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Last modified May 5 20:30 EDT 2024. Contains 372287 sequences. (Running on oeis4.)