0,1

a(0)=6

a(1)=6 because 6*6 = 36

a(2)=26 because 36*26 = 936

a(3)=126 because 936*126 = 117936

a(4)=62501 because 117936*62501 = 7371117936

P:=proc(n) local i, j, k; k:=0; j:=n; while j>0 do j:=trunc(j/10); k:=k+1; od; for i from 2 by 1 to n^2 do j:=((n*(i-1)) mod (10^k)); if j=0 then print(i, n*i); break; fi; od; end: P(126);

Sequence in context: A087236 A077193 A056482 this_sequence A016725 A151779 A066714

Adjacent sequences: A123871 A123872 A123873 this_sequence A123875 A123876 A123877

nonn

Paolo P. Lava & Giorgio Balzarotti (ppl(AT)spl.at), Oct 17 2006, Oct 24 2006