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A123810
Number of ways, counted up to symmetry, to build a contiguous building with n LEGO blocks of size 1x8.
0
1, 40, 5425, 853908, 147609509, 27054419032
OFFSET
1,2
CROSSREFS
KEYWORD
nonn,hard
AUTHOR
Søren Eilers, Oct 29 2006
STATUS
approved