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A362223
a(n) is the number of n-celled fixed rounded polyominoes.
2
1, 4, 20, 113, 682, 4294, 27830, 184240, 1239575, 8446660, 58150684, 403735761
OFFSET
1,2
COMMENTS
See A056840 for the definition of rounded polyominoes.
CROSSREFS
Sequence in context: A209200 A294119 A245375 * A108447 A287512 A367237
KEYWORD
nonn,more
AUTHOR
John Mason, Apr 11 2023
STATUS
approved