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

6, 6, 26, 126, 62501, 625000001, 625000000000000001, 625000000000000000000000000000000001, 625000000000000000000000000000000000000000000000000000000000000000000001

Offset

0,1

References

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

Links

Bert Dobbelaere, Table of n, a(n) for n = 0..15

Example

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.

Maple

P:=proc(q, h) local a, b, k, n; a:=h; b:=ilog10(a)+1; print(h);
for k from 1 to 10 do for n from 2 to q do
if ((a*n) mod 10^b)=a then print(n); a:=a*n; b:=ilog10(a)+1;
break; fi; od; od; end: P(10^9, 6);

Crossrefs

Cf. A123872.

Sequence in context: A056482 A255466 A286482 * A339321 A241865 A243122

Adjacent sequences: A123871 A123872 A123873 * A123875 A123876 A123877

Keyword

nonn,base

Author

Paolo P. Lava and Giorgio Balzarotti, Oct 17 2006, Oct 24 2006

Extensions

More terms from Bert Dobbelaere, Aug 08 2023

Status

approved