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A357083
a(n) is the number of free polycubes of size n with holes.
1
11, 215, 3173, 38564
OFFSET
11,1
CROSSREFS
Cf. A038119, A355966 (which distinguishes reflections).
Sequence in context: A137464 A357915 A187650 * A214687 A160074 A298889
KEYWORD
nonn,more,hard
AUTHOR
John Mason, Sep 11 2022
STATUS
approved