A120413 - OEIS

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A120413

Largest even number strictly less than n^2.

0, 2, 8, 14, 24, 34, 48, 62, 80, 98, 120, 142, 168, 194, 224, 254, 288, 322, 360, 398, 440, 482, 528, 574, 624, 674, 728, 782, 840, 898, 960, 1022, 1088, 1154, 1224, 1294, 1368, 1442, 1520, 1598, 1680, 1762, 1848, 1934, 2024, 2114, 2208, 2302, 2400, 2498, 2600 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	COMMENTS	`Longest non-intersecting route from (0,0) to (n,n) staying in an n*n box (shortest route is length 2n A005843).`
	FORMULA	`a(n) =2ceiling[n^2/2]-2 =2A074148(n) =A085046(n)-1.`
	CROSSREFS	`Sequence in context: A161464 A121055 A107072 * A161156 A125902 A173974` `Adjacent sequences: A120410 A120411 A120412 * A120414 A120415 A120416`
	KEYWORD	`easy,nonn`
	AUTHOR	`Henry Bottomley (se16(AT)btinternet.com), Jul 06 2006`

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Last modified February 17 23:08 EST 2012. Contains 206085 sequences.