cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A073550 Number of Fibonacci numbers F(k), k <= 10^n, which end in 1.

Original entry on oeis.org

3, 14, 134, 1334, 13334, 133334, 1333334, 13333334, 133333334, 1333333334, 13333333334, 133333333334, 1333333333334, 13333333333334, 133333333333334, 1333333333333334, 13333333333333334, 133333333333333334
Offset: 1

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Author

Shyam Sunder Gupta, Aug 15 2002

Keywords

Examples

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

Crossrefs

Cf. A072675. Different from A072509.

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]

Extensions

More terms from Vladeta Jovovic, Aug 20 2002