A163897 - OEIS

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A163897

a(n) = A163531(n)-A163547(n).

0, 0, 2, 4, -2, -8, -6, 0, 0, 0, 2, 16, 16, 12, 6, 0, 0, 8, 10, 24, 28, 16, 0, 0, 0, 0, 10, 28, 24, 16, 32, 40, 48, 48, 24, 20, -2, -24, -40, -36, -40, -44, -64, -60, -56, -48, -42, -56, -42, -36, -20, -16, -8, 0, 16, 8, 14, 36, 34, 24, 28, 28, 18, 24, 16, 8, -8, 0, -10 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,3`
	COMMENTS	`This sequence gives the difference of squares of distance from the origin to the n-th term, in two different types of Hilbert's curves on NxN grid (A163357 and A163334). Because the former is based on the powers of 4 and the latter on the powers of 9, the graph of this sequence contains dramatic swings.`
	LINKS	`A. Karttunen, Table of n, a(n) for n = 0..65535`
	CROSSREFS	`Sequence in context: A090988 A095728 A174147 * A204898 A113477 A129178` `Adjacent sequences: A163894 A163895 A163896 * A163898 A163899 A163900`
	KEYWORD	`sign`
	AUTHOR	`Antti Karttunen (His-Firstname.His-Surname(AT)gmail.com), Sep 19 2009`

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Last modified February 16 15:27 EST 2012. Contains 205930 sequences.