A061835 - OEIS

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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.

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 (amarnath_murthy(AT)yahoo.com), 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 June 18 21:31 EDT 2013. Contains 226356 sequences.