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A123796 Number of ways, counted up to symmetry, to build a contiguous building with n LEGO blocks of size 1 X 6 which is flat, i.e., with all blocks in parallel position. 0
1, 6, 79, 1138, 18057, 296884, 5022086, 86581805, 1515222912 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
CROSSREFS
Sequence in context: A294992 A093033 A156929 * A184553 A129524 A131237
KEYWORD
nonn,hard
AUTHOR
Søren Eilers, Oct 29 2006
STATUS
approved

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Last modified March 29 09:44 EDT 2024. Contains 371268 sequences. (Running on oeis4.)