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A064754 n*8^n - 1. 1
7, 127, 1535, 16383, 163839, 1572863, 14680063, 134217727, 1207959551, 10737418239, 94489280511, 824633720831, 7146825580543, 61572651155455, 527765581332479, 4503599627370495, 38280596832649215, 324259173170675711 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Paul Leyland, Factors of Cullen and Woodall numbers

Paul Leyland, Generalized Cullen and Woodall numbers

PROG

(MAGMA) [ n*8^n-1: n in [1..20]]; // Vincenzo Librandi, Sep 16 2011

CROSSREFS

Sequence in context: A061744 A053716 A088550 * A025166 A139291 A092676

Adjacent sequences:  A064751 A064752 A064753 * A064755 A064756 A064757

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), Oct 19 2001

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Last modified February 17 12:30 EST 2012. Contains 206013 sequences.