id:A043529 - OEIS Search Results

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Number of distinct base 2 digits of n.

+0
4

1, 1, 2, 1, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2 (list; graph; listen)

	OFFSET	`0,3`
	FORMULA	`Contribution from Johannes W. Meijer (meijgia(AT)hotmail.com), May 24 2009: (Start)` `a(0) = 1; a(n)= denom((abs(floor(ln(n+1)/ln(2))+((n)mod 2) - floor(ln(n)/ln(2))-((n-1) mod 2)))/2) for n = 2, 3, .. .` `(End)`
	MAPLE	`Contribution from Johannes W. Meijer (meijgia(AT)hotmail.com), May 24 2009: (Start)` `nmax:=128; a(0):=1: for n from 1 to nmax do a(n):= denom((abs(floor(ln(n+1)/ln(2))+ ((n)mod 2) -floor(ln(n)/ln(2))-((n-1) mod 2)))/2) end do: seq(a(n), n=0..nmax);` `(End)`
	CROSSREFS	`Contribution from Johannes W. Meijer (meijgia(AT)hotmail.com), May 24 2009: (Start)` `Factor of A160466.` `Cf. A007456 and A081729.` `(End)` `Sequence in context: A101422 A070304 A083952 this_sequence A080942 A099812 A068068` `Adjacent sequences: A043526 A043527 A043528 this_sequence A043530 A043531 A043532`
	KEYWORD	`nonn,base`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`
	EXTENSIONS	`First term added and offset changed by Johannes W. Meijer (meijgia(AT)hotmail.com), May 15 2009`

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Last modified November 23 17:09 EST 2009. Contains 167438 sequences.

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