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Search: id:A117860
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A117860 Number of palindromes of length n (in base 8). +0
1
7, 7, 56, 56, 448, 448, 3584, 3584, 28672, 28672, 229376, 229376 (list; graph; listen)
OFFSET

1,1

FORMULA

a(n) = 7*8^floor((n-1)/2)

CROSSREFS

Cf. A050683.

Sequence in context: A022667 A143430 A038273 this_sequence A009201 A065240 A072399

Adjacent sequences: A117857 A117858 A117859 this_sequence A117861 A117862 A117863

KEYWORD

nonn

AUTHOR

Martin Renner (martin.renner(AT)gmx.net), May 02 2006

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Last modified November 18 20:14 EST 2008. Contains 147244 sequences.


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