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A093138 Expansion of (1-7x)/(1-10x). 4
1, 3, 30, 300, 3000, 30000, 300000, 3000000, 30000000, 300000000, 3000000000, 30000000000, 300000000000, 3000000000000, 30000000000000, 300000000000000, 3000000000000000, 30000000000000000, 300000000000000000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Partial sums are A093137. A convex combination of 10^n and 0^n.

LINKS

Table of n, a(n) for n=0..18.

M. H. Cilasun, An Analytical Approach to Exponent-Restricted Multiple Counting Sequences, arXiv preprint arXiv:1412.3265 [math.NT], 2014.

M. H. Cilasun, Generalized Multiple Counting Jacobsthal Sequences of Fermat Pseudoprimes, Journal of Integer Sequences, Vol. 19, 2016, #16.2.3.

M. Janjic, On Linear Recurrence Equations Arising from Compositions of Positive Integers, Journal of Integer Sequences, Vol. 18 (2015), Article 15.4.7.

Index entries for linear recurrences with constant coefficients, signature (10).

FORMULA

a(n) = 3*10^n/10 + 7*0^n/10.

a(n) = 3*10^(n-1) with a(0)=1. - Vincenzo Librandi, Aug 02 2010

PROG

(PARI) Vec((1-7*x)/(1-10*x) + O(x^30)) \\ Michel Marcus, Sep 07 2015

CROSSREFS

Sequence in context: A136935 A136942 A136947 * A073557 A037764 A037652

Adjacent sequences:  A093135 A093136 A093137 * A093139 A093140 A093141

KEYWORD

nonn,easy

AUTHOR

Paul Barry, Mar 24 2004

STATUS

approved

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Last modified May 31 19:40 EDT 2020. Contains 334748 sequences. (Running on oeis4.)