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A337503
Minimum number of painted cells in an n X n grid to avoid unpainted pentominoes.
1
0, 0, 3, 5, 8, 13, 17, 24, 31, 39
OFFSET
1,3
EXAMPLE
For n = 3, painting only 2 cells would leave an unpainted pentomino, but painting the following 3 cells avoids all unpainted pentominoes:
. . .
. X X
X . .
CROSSREFS
Sequence in context: A097431 A123929 A036715 * A310035 A310036 A265046
KEYWORD
nonn,more
AUTHOR
Rob Pratt, Aug 29 2020
STATUS
approved