|
|
A112389
|
|
Number of ways, counted up to symmetry, to build a contiguous building with n LEGO blocks of size 2 X 4.
|
|
67
|
|
|
|
OFFSET
|
1,2
|
|
COMMENTS
|
a(6) is often quoted as 102981500, but this is incorrect.
|
|
REFERENCES
|
Anthony Lane, The Joy of Bricks, The New Yorker, Apr 27-May 04, 1998, pp. 96-103.
|
|
LINKS
|
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,hard,more
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|