A181106 - OEIS

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A181106

Largest odd number strictly less than a square.

-1, 3, 7, 15, 23, 35, 47, 63, 79, 99, 119, 143, 167, 195, 223, 255, 287, 323, 359, 399, 439, 483, 527, 575, 623, 675, 727, 783, 839, 899, 959, 1023, 1087, 1155, 1223, 1295, 1367, 1443, 1519, 1599, 1679, 1763, 1847, 1935, 2023, 2115, 2207, 2303, 2399, 2499 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,2`
	COMMENTS	`The terms are negatives of A141354 and therefore have the same generating function except the sign.`
	LINKS	`Table of n, a(n) for n=1..50.`
	FORMULA	`a(n) = n^2 - 2^(n mod 2) = -A141354(n-1).`
	MATHEMATICA	`Table[n^2-2^Mod[n, 2], {n, 50}] (Ray Chandler, Dec 05 2011)`
	CROSSREFS	`Equals minus A141354. Cf. A120413 (Largest even number strictly less than a square).` `Sequence in context: A187220 A067317 A141354 * A131753 A171503 A001213` `Adjacent sequences: A181103 A181104 A181105 * A181107 A181108 A181109`
	KEYWORD	`easy,sign`
	AUTHOR	`Jerzy Kocik (jkocik(AT)siu.edu), Oct 03 2010`
	EXTENSIONS	`Edited by Ray Chandler, Dec 05 2011`
	STATUS	`approved`

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Last modified June 19 01:02 EDT 2013. Contains 226359 sequences.