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A123798
Number of ways to build a contiguous building with n LEGO blocks of size 1x6 on top of a fixed block of the same size.
0
47, 2944, 256193, 24607451, 2555265136, 278052511951
(list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
The base block is not counted among the n and must be the only block in the bottom layer of the building
LINKS
Table of n, a(n) for n=1..6.
CROSSREFS
Cf. A112389, A123762 - A123827, A123829 - A123849.
Sequence in context: A052463 A327770 A005148 * A104069 A334180 A194617
Adjacent sequences: A123795 A123796 A123797 * A123799 A123800 A123801
KEYWORD
nonn,hard
AUTHOR
Søren Eilers, Oct 29 2006
STATUS
approved

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Last modified October 5 08:10 EDT 2024. Contains 376531 sequences.
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