id:A070972 - OEIS Search Results

Search: id:A070972

Displaying 1-1 of 1 results found.

page 1

Length of longest run of consecutive 1's in binary expansion of 3^n (A004656).

+0
1

1, 2, 1, 2, 1, 4, 2, 2, 2, 3, 3, 7, 6, 4, 5, 4, 3, 4, 4, 4, 6, 5, 5, 4, 3, 2, 10, 8, 7, 5, 4, 5, 7, 9, 8, 6, 5, 7, 11, 10, 8, 6, 6, 4, 9, 7, 6, 4, 9, 8, 6, 9, 8, 6, 5, 5, 3, 4, 7, 5, 10, 8, 7, 6, 6, 6, 6, 4, 4, 7, 7, 5, 5, 5, 5, 5, 5, 9, 8, 6, 5, 6, 5, 6, 5, 5, 4, 6, 5, 10, 8, 7, 5, 6, 6, 6, 7, 7, 6, 7, 5, 5, 5, 9 (list; graph; listen)

	OFFSET	`0,2`
	EXAMPLE	`3^11 = (101011001111111011) binary, so a(11) = 7.`
	MATHEMATICA	`f[n_Integer] := Block[{p = Flatten[ Position[ Prepend[ IntegerDigits[2*3^n, 2], 0], 0]]}, Max[Drop[p, 1] - Drop[p, -1]] - 1]; Table[ f[n], {n, 0, 103}]`
	CROSSREFS	`Cf. A004656 and A011754.` `Sequence in context: A077191 A050363 A111588 this_sequence A075997 A029196 A051493` `Adjacent sequences: A070969 A070970 A070971 this_sequence A070973 A070974 A070975`
	KEYWORD	`base,easy,nonn`
	AUTHOR	`Frank Schwellinger (nummer_eins(AT)web.de), Jan 03 2003`
	EXTENSIONS	`Edited by Robert G. Wilson v (rgwv(AT)rgwv.com), Jan 04 2002`

page 1

Search completed in 0.002 seconds

Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

AT&T Labs Research