A087060 - OEIS

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A087060

Difference between 2 * n^2 and the nearest square number.

1, 1, 2, 4, 1, 8, 2, 7, 7, 4, 14, 1, 14, 8, 9, 17, 2, 23, 7, 16, 18, 7, 31, 4, 25, 17, 14, 32, 1, 36, 14, 23, 31, 8, 49, 9, 34, 28, 17, 49, 2, 47, 23, 28, 46, 7, 62, 16, 41, 41, 18, 68, 7, 56, 34, 31, 63, 4, 73, 25, 46, 56, 17, 89, 14, 63, 47, 32, 82, 1, 82, 36, 49, 73, 14, 103, 23, 68 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,3`
	FORMULA	`A087060(n) = min [A087056(n), A087059(n)] = min [2n^2 - (floor[nsqrt(2)])^2, (1 + floor[nsqrt(2)])^2 - 2n^2]`
	EXAMPLE	`A087060(10) = 4 because the difference between 2*10^2 = 200 and the nearest square number (196) is 4.`
	CROSSREFS	`Cf. A001951, A087055, A087056, A087057, A087058, A087059.` `Sequence in context: A204182 A103324 A181266 * A173122 A065278 A112931` `Adjacent sequences: A087057 A087058 A087059 * A087061 A087062 A087063`
	KEYWORD	`easy,nonn`
	AUTHOR	`Jens Voss (jens(AT)voss-ahrensburg.de), Aug 07 2003`

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Last modified February 14 13:08 EST 2012. Contains 205623 sequences.