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%I #25 Mar 02 2024 01:28:23
%S 9,3,5,5,3,9,3,5,5,3,9,3,5,5,3,9,3,5,5,3,9,3,5,5,3,9,3,5,5,3,9,3,5,5,
%T 3,9,3,5,5,3,9,3,5,5,3,9,3,5,5,3,9,3,5,5,3,9,3,5,5,3,9,3,5,5,3,9,3,5,
%U 5,3,9,3,5,5,3,9,3,5,5,3,9,3,5,5,3
%N Last digit of A145923(n).
%C The numbers also populate the 5th row of A107449.
%H <a href="/index/Rec#order_05">Index entries for linear recurrences with constant coefficients</a>, signature (0,0,0,0,1).
%F a(n) = A145923(n) mod 10.
%F Period length 5: a(n+5) = a(n).
%F G.f.: (9+3x+5x^2+5x^3+3x^4)/((1-x)(1+x+x^2+x^3+x^4)). - _R. J. Mathar_, Dec 08 2008
%t PadRight[{},100,{9,3,5,5,3}] (* _Harvey P. Dale_, Jul 05 2012 *)
%o (PARI) a(n)=[9,3,5,5,3][n%5+1]; \\ _Jinyuan Wang_, Mar 23 2020
%Y Cf. A010879 (last digit), A145923.
%K nonn,base,less
%O 0,1
%A _Paul Curtz_, Oct 25 2008
%E Edited by _R. J. Mathar_, Dec 08 2008