id:A055253 - OEIS Search Results

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Number of even digits in 2^n.

+0
3

0, 1, 1, 1, 1, 1, 2, 2, 2, 1, 3, 4, 3, 2, 3, 3, 2, 2, 5, 5, 4, 3, 4, 6, 3, 3, 6, 4, 6, 4, 5, 7, 6, 4, 4, 4, 5, 4, 7, 5, 4, 5, 7, 9, 8, 8, 8, 7, 8, 6, 10, 8, 7, 7, 9, 9, 6, 8, 8, 11, 11, 9, 12, 10, 10, 10, 13, 9, 8, 8, 10, 16, 15, 10, 13, 8, 7, 12, 12, 14, 13, 12, 15, 11, 12, 14, 10, 14, 16, 14, 16 (list; graph; listen)

	OFFSET	`0,7`
	MAPLE	`A055253 := proc(val) local i, j, k, n; n := 2^val; j := 0; k := floor(ln(n)/ln(10))+1; for i from 1 to k do if (n mod 10) mod 2 = 0 then j := j+1 fi; n := floor(n/10); od; RETURN(j); end: seq(A055253(n), n=0..110); (Jaap Spies)`
	CROSSREFS	`Cf. A055254, A034887.` `Sequence in context: A060610 A017125 A063276 this_sequence A103626 A026268 A089258` `Adjacent sequences: A055250 A055251 A055252 this_sequence A055254 A055255 A055256`
	KEYWORD	`nonn,base,easy`
	AUTHOR	`Asher Auel (asher.auel(AT)reed.edu) May 05 2000`
	EXTENSIONS	`More terms from Jaap Spies (j.spies(AT)hccnet.nl), Dec 30 2003`

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Last modified November 21 14:49 EST 2008. Contains 150807 sequences.

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