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A117860 Number of palindromes of length n (in base 8). 0
7, 7, 56, 56, 448, 448, 3584, 3584, 28672, 28672, 229376, 229376 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

FORMULA

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

CROSSREFS

Cf. A050683.

Sequence in context: A203066 A165425 A153272 * A009201 A065240 A178708

Adjacent sequences:  A117857 A117858 A117859 * A117861 A117862 A117863

KEYWORD

nonn,base

AUTHOR

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

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Last modified February 17 00:09 EST 2012. Contains 205978 sequences.