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A061835 a(1) = 5; a(n) = smallest power of 5 (larger than a(n-1)) with a(n-1) forming its final digits. 0
5, 25, 125, 3125, 1953125, 45474735088646411895751953125 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..6.

Index entries for sequences related to final digits of numbers

EXAMPLE

After 3125 = 5^5 the next term is 1953125 = 5^9, containing 3125 as its final digits.

PROG

(ARIBAS) a := 5; n := 1; writeln("a(", n, ") = ", a); stop := 50000; run := true; c := 1; while run do b := a; len := length(itoa(b)); inc(n); a := 1; while a mod 10^len <> b and c <> stop do inc(c); a := 5^c; end; if c < stop then writeln("a(", n, ") = ", 5, "^", c, " = ", a); else writeln("a(", n, ") > ", 5, "^", c); run := false; end; end;

CROSSREFS

Sequence in context: A113996 A062875 A140288 * A030988 A173260 A080516

Adjacent sequences:  A061832 A061833 A061834 * A061836 A061837 A061838

KEYWORD

nonn,base

AUTHOR

Amarnath Murthy, May 29 2001

EXTENSIONS

Description corrected by and one more term from Klaus Brockhaus, Jun 03 2001, who remarks that the next term is > 5^50000. 6-th term also found by Frank Ellermann, Jun 04 2001.

STATUS

approved

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Last modified September 30 23:47 EDT 2014. Contains 247496 sequences.