A126207 - OEIS

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A126207

Number of 5's in decimal expansion of 5^n.

0, 1, 1, 1, 1, 1, 2, 1, 1, 2, 2, 1, 1, 1, 3, 3, 3, 2, 2, 1, 2, 2, 3, 3, 3, 2, 2, 4, 2, 3, 5, 3, 2, 3, 3, 2, 5, 4, 3, 5, 2, 6, 5, 1, 2, 1, 6, 5, 6, 4, 4, 3, 2, 4, 9, 9, 9, 4, 4, 2, 5, 2, 4, 5, 5, 7, 8, 6, 5, 5, 5, 7, 6, 11, 7, 7, 5, 5, 6, 7, 6, 8, 8, 10, 5, 6, 7, 8, 9, 4, 10, 7, 4, 8, 10, 9, 6, 5, 6, 10, 6 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,7`
	MAPLE	`P:=proc(n) local i, k, x, y, w, cont; y:=5; k:=y; for i from 0 by 1 to n do x:=y^i; cont:=0; while x>0 do w:=x-trunc(x/10)*10; if w=k then cont:=cont+1; fi; x:=trunc(x/10); od; print(cont); od; end: P(100);`
	CROSSREFS	`Cf. A065710, A126205, A126206, A126208, A126209, A126210, A126211.` `Sequence in context: A079882 A014709 A069258 * A191322 A046219 A088978` `Adjacent sequences: A126204 A126205 A126206 * A126208 A126209 A126210`
	KEYWORD	`nonn,base`
	AUTHOR	`Paolo P. Lava & Giorgio Balzarotti (paoloplava(AT)gmail.com), Dec 20 2006`

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Last modified February 16 03:44 EST 2012. Contains 205860 sequences.