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 A123874 Similar to A123872 but with a(0)=6 as seed. 0

%I

%S 6,6,26,126,62501,625000001

%N Similar to A123872 but with a(0)=6 as seed.

%D G. Balzarotti and P. P. Lava, Le sequenze di numeri interi, Hoepli, 2008, p. 99.

%e a(0)=6;

%e a(1)=6 because 6*6 = 36;

%e a(2)=26 because 36*26 = 936;

%e a(3)=126 because 936*126 = 117936;

%e a(4)=62501 because 117936*62501 = 7371117936.

%p P:=proc(q,h) local a,b,k,n; a:=h; b:=ilog10(a)+1; print(h);

%p for k from 1 to 10 do for n from 2 to q do

%p if ((a*n) mod 10^b)=a then print(n); a:=a*n; b:=ilog10(a)+1;

%p break; fi; od; od; end: P(10^9,6);

%K nonn,base,more

%O 0,1

%A _Paolo P. Lava_ and _Giorgio Balzarotti_, Oct 17 2006, Oct 24 2006

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Last modified August 19 04:02 EDT 2019. Contains 326109 sequences. (Running on oeis4.)