A337503 - OEIS

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A337503

Minimum number of painted cells in an n X n grid to avoid unpainted pentominoes.

0, 0, 3, 5, 8, 13, 17, 24, 31, 39 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,3`
	LINKS	`Table of n, a(n) for n=1..10.` `Puzzling Stack Exchange, Least number of marked symbols`
	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	`Cf. A337501, A337502.` `Sequence in context: A097431 A123929 A036715 * A310035 A310036 A265046` `Adjacent sequences: A337500 A337501 A337502 * A337504 A337505 A337506`
	KEYWORD	`nonn,more`
	AUTHOR	`Rob Pratt, Aug 29 2020`
	STATUS	`approved`

Last modified March 8 11:25 EST 2021. Contains 341948 sequences. (Running on oeis4.)