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A073550 Number of Fibonacci numbers F(k), k <= 10^n, which end in 1. 2
3, 14, 134, 1334, 13334, 133334, 1333334, 13333334, 133333334, 1333333334, 13333333334, 133333333334, 1333333333334, 13333333333334, 133333333333334, 1333333333333334, 13333333333333334, 133333333333333334 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..18.

FORMULA

a(n) = ceiling((10^n-1)/60) + ceiling((10^n-2)/60) + ceiling((10^n-8)/60) + ceiling((10^n-19)/60) + ceiling((10^n-22)/60) + ceiling((10^n-28)/60) + ceiling((10^n-41)/60) + ceiling((10^n-59)/60).

a(n) = ceiling(40/3*10^(n-1)) for n>1. - Benoit Cloitre, Aug 27 2002; [Edited by Felix Fröhlich, Jun 08 2019]

EXAMPLE

a(2) = 14 because there are 14 Fibonacci numbers up to 10^2 which end in 1.

CROSSREFS

Cf. A072675. Different from A072509.

Sequence in context: A061029 A096657 A126933 * A319361 A002966 A075654

Adjacent sequences:  A073547 A073548 A073549 * A073551 A073552 A073553

KEYWORD

base,nonn

AUTHOR

Shyam Sunder Gupta, Aug 15 2002

EXTENSIONS

More terms from Vladeta Jovovic, Aug 20 2002

STATUS

approved

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Last modified July 8 01:48 EDT 2020. Contains 335502 sequences. (Running on oeis4.)