

A094622


Expansion of x*(11+20*x)/((1x)*(110*x^2)).


2



0, 11, 31, 141, 341, 1441, 3441, 14441, 34441, 144441, 344441, 1444441, 3444441, 14444441, 34444441, 144444441, 344444441, 1444444441, 3444444441, 14444444441, 34444444441, 144444444441, 344444444441, 1444444444441
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OFFSET

0,2


COMMENTS

Previous name: Sequence whose nth term's digits sum to 2n.
a(n) is the digit reversal of A094621(n).


LINKS

Table of n, a(n) for n=0..23.
Index entries for linear recurrences with constant coefficients, signature (1,10,10).


FORMULA

G.f.: x*(11+20*x)/((1x)*(110*x^2));
a(n) = (10^(n/2)*(31 + 13*sqrt(10) + (31  13*sqrt(10))*(1)^n)/2  31)/9.
E.g.f.: (1/18)*exp(sqrt(10)*x)*(3113*sqrt(10)+(31+13*sqrt(10))*exp(2*sqrt(10)*x)62*exp(x+sqrt(10)*x)).  Stefano Spezia, Sep 04 2019


MATHEMATICA

LinearRecurrence[{1, 10, 10}, {0, 11, 31}, 30] (* Harvey P. Dale, May 03 2016 *)


CROSSREFS

Cf. A094620, A094621.
Sequence in context: A082712 A049090 A181150 * A193645 A190781 A001604
Adjacent sequences: A094619 A094620 A094621 * A094623 A094624 A094625


KEYWORD

easy,nonn,base


AUTHOR

Paul Barry, May 15 2004


STATUS

approved



