id:A116962 - OEIS Search Results

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Floor of the base n Log of the number obtained concatenating n with itself n times.

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4, 5, 6, 6, 7, 8, 8, 9, 19, 20, 21, 22, 23, 24, 25, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 56, 57, 58, 59, 60, 61, 62, 63, 63, 64, 65, 66, 67, 68, 69, 69, 70, 71, 72, 73, 74, 74, 75, 76, 77, 78 (list; graph; listen)

	OFFSET	`2,1`
	COMMENT	`a(100)=149, a(1000)=1333, a(10000)=12499.`
	EXAMPLE	`a(8)=8 since 88888888=8^8.802.`
	MATHEMATICA	`Table[Floor@Log[n, FromDigits@Flatten@IntegerDigits@Array[n &, n]], {n, 2, 60}]`
	CROSSREFS	`Sequence in context: A058979 A046343 A022911 this_sequence A023846 A046345 A004445` `Adjacent sequences: A116959 A116960 A116961 this_sequence A116963 A116964 A116965`
	KEYWORD	`base,nonn`
	AUTHOR	`Giovanni Resta (g.resta(AT)iit.cnr.it), Apr 04 2006`

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Last modified July 23 17:35 EDT 2008. Contains 142285 sequences.

AT&T Labs Research