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A123794
Number of ways, counted up to symmetry, to build a contiguous building with n LEGO blocks of size 1x6.
0
1, 24, 1861, 168661, 16902651, 1797062518, 199090941069
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OFFSET
1,2
LINKS
Table of n, a(n) for n=1..7.
CROSSREFS
Cf.
A112389
,
A123762
-
A123827
,
A123829
-
A123849
.
Sequence in context:
A227257
A222999
A166788
*
A269648
A269338
A003738
Adjacent sequences:
A123791
A123792
A123793
*
A123795
A123796
A123797
KEYWORD
nonn
,
hard
AUTHOR
Søren Eilers
, Oct 29 2006
STATUS
approved
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Last modified August 24 14:29 EDT 2024. Contains 375415 sequences. (Running on oeis4.)