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 A090617 Highest power of 8 dividing n!. 5
 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 8, 10, 10, 10, 10, 11, 11, 11, 11, 12, 12, 13, 13, 13, 13, 14, 14, 15, 15, 15, 15, 16, 16, 16, 16, 17, 17, 18, 18, 18, 18, 19, 19, 21, 21, 21, 21, 22, 22, 22, 22, 23, 23, 23, 23, 24, 24, 24, 24 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,9 LINKS FORMULA a(n) =A090622(n, 8) =[A011371(n)/3] =[([n/2]+[n/4]+[n/8]+[n/16]+...)/3]. EXAMPLE a(8)=2 since 8!=40320=8^2*630. MATHEMATICA Table[IntegerExponent[n!, 8], {n, 0, 80}] (* Harvey P. Dale, Mar 21 2013 *) CROSSREFS Cf. A011371, A054861, A090616, A027868, A054896. Sequence in context: A209628 A132011 A054893 * A053693 A291309 A280472 Adjacent sequences:  A090614 A090615 A090616 * A090618 A090619 A090620 KEYWORD nonn AUTHOR Henry Bottomley, Dec 06 2003 STATUS approved

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Last modified October 22 19:53 EDT 2019. Contains 328319 sequences. (Running on oeis4.)