A121150 - OEIS

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A121150

Minimal number of vertices in an n-polyomino.

4, 6, 8, 9, 11, 12, 14, 15, 16, 18, 19, 20, 22, 23, 24, 25 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	COMMENTS	`It appears that a(n) = A080037[n] = n + Floor[Sqrt[4n-3]] + 2 for n>0.`
	LINKS	`Eric Weisstein's World of Mathematics, Polyomino.`
	CROSSREFS	`Cf. A080037.` `Sequence in context: A205530 A100373 A123938 * A049579 A137242 A098015` `Adjacent sequences: A121147 A121148 A121149 * A121151 A121152 A121153`
	KEYWORD	`nonn`
	AUTHOR	`Alexander Adamchuk (alex(AT)kolmogorov.com), Aug 12 2006`

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Last modified February 12 18:43 EST 2012. Contains 205432 sequences.