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Search: id:A087120
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A087120 Smallest numbers having in binary representation exactly n maximal groups of consecutive zeros. +0
3
1, 0, 10, 42, 170, 682, 2730, 10922, 43690, 174762, 699050, 2796202, 11184810, 44739242, 178956970, 715827882, 2863311530, 11453246122, 45812984490, 183251937962, 733007751850, 2932031007402, 11728124029610, 46912496118442 (list; graph; listen)
OFFSET

0,3

COMMENT

A087116(a(n))=n and A087116(k)<n for k<a(n);

For n>1, a(n) = A020988(n-1).

LINKS

Index entries for sequences related to binary expansion of n

FORMULA

a(0)=1, a(1)=0, a(2)=10, a(n)=4*a(n-1)+2.

CROSSREFS

Cf. A087118, A023416, A007088.

Sequence in context: A108678 A027171 A003822 this_sequence A027149 A077541 A084036

Adjacent sequences: A087117 A087118 A087119 this_sequence A087121 A087122 A087123

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Aug 14 2003

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Last modified December 20 16:54 EST 2009. Contains 171081 sequences.


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