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A116962 Floor of the base n Log of the number obtained concatenating n with itself n times. 0
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; refs; listen; history; text; internal format)
OFFSET

2,1

COMMENTS

a(100)=149, a(1000)=1333, a(10000)=12499.

LINKS

Table of n, a(n) for n=2..73.

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: A319500 A022911 A162310 * A273777 A023846 A046345

Adjacent sequences:  A116959 A116960 A116961 * A116963 A116964 A116965

KEYWORD

base,nonn

AUTHOR

Giovanni Resta, Apr 04 2006

STATUS

approved

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Last modified February 20 14:49 EST 2019. Contains 320327 sequences. (Running on oeis4.)