id:A030000 - OEIS Search Results

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Susanna's sequence: smallest nonnegative number k such that 2^k contains n.

+0
12

10, 0, 1, 5, 2, 8, 4, 15, 3, 12, 10, 40, 7, 17, 18, 21, 4, 27, 30, 13, 11, 18, 43, 41, 10, 8, 18, 15, 7, 32, 22, 17, 5, 25, 27, 25, 16, 30, 14, 42, 12, 22, 19, 22, 18, 28, 42, 31, 11, 32, 52, 9, 19, 16, 25, 16, 8, 20, 33, 33, 23, 58, 18, 14, 6, 16, 46, 24, 15, 34, 29, 21, 17, 30 (list; graph; listen)

	OFFSET	`0,1`
	LINKS	`T. D. Noe, Table of n, a(n) for n=0..1000`
	EXAMPLE	`2^12 = 4096 is first power of 2 containing a 9, so a(9) = 12.`
	MATHEMATICA	`Table[ i=0; While[ StringPosition[ ToString[ 2^i ], ToString[ n ] ]=={}, i++ ]; i, {n, 0, 80} ]`
	CROSSREFS	`Cf. A030001, A063565, A018856.` `Sequence in context: A064511 A003785 A038689 this_sequence A062520 A157962 A063741` `Adjacent sequences: A029997 A029998 A029999 this_sequence A030001 A030002 A030003`
	KEYWORD	`nonn,base,nice`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`
	EXTENSIONS	`More terms from Hans Havermann (pxp(AT)rogers.com)`

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Last modified November 22 20:51 EST 2009. Contains 167312 sequences.

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