A056979 - OEIS

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A056979

Number of blocks of {1, 0, 1} in binary expansion of n.

0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 1, 2, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 1, 2, 2, 1, 2, 1, 1, 0, 0, 0, 0, 1, 2, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 1, 0, 1, 0, 0, 1, 1, 1, 1, 2, 3, 2, 2, 1, 1, 2, 2, 1, 2, 1, 1, 0, 0, 0, 0, 0, 1, 0 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,21`
	LINKS	`Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.`
	FORMULA	`a(2n) = a(n), a(2n+1) = a(n) + [n congruent to 2 mod 4]. - Ralf Stephan (ralf(AT)ark.in-berlin.de), Aug 22 2003`
	CROSSREFS	`Cf. A014082, A056974, A056975, A056976, A056977, A056978, A056979, A056980.` `Sequence in context: A035200 A198066 A141664 * A087812 A113045 A204179` `Adjacent sequences: A056976 A056977 A056978 * A056980 A056981 A056982`
	KEYWORD	`nonn`
	AUTHOR	`Eric Weisstein (eric(AT)weisstein.com)`

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Last modified February 17 18:28 EST 2012. Contains 206067 sequences.