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A064751 n*5^n - 1. 3
4, 49, 374, 2499, 15624, 93749, 546874, 3124999, 17578124, 97656249, 537109374, 2929687499, 15869140624, 85449218749, 457763671874, 2441406249999, 12969970703124, 68664550781249, 362396240234374, 1907348632812499 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Harry J. Smith, Table of n, a(n) for n=1,...,150

Paul Leyland, Factors of Cullen and Woodall numbers

Paul Leyland, Generalized Cullen and Woodall numbers

Index entries for linear recurrences with constant coefficients, signature (11,-35,25).

MATHEMATICA

Table[n*5^n-1, {n, 20}] (* or *) LinearRecurrence[{11, -35, 25}, {4, 49, 374}, 20] (* Harvey P. Dale, Jun 25 2017 *)

PROG

(PARI) { for (n=1, 150, write("b064751.txt", n, " ", n*5^n - 1) ) } [From Harry J. Smith, Sep 24 2009]

CROSSREFS

Sequence in context: A000596 A113525 A224538 * A045787 A067474 A053769

Adjacent sequences:  A064748 A064749 A064750 * A064752 A064753 A064754

KEYWORD

nonn,changed

AUTHOR

N. J. A. Sloane, Oct 19 2001

STATUS

approved

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Last modified June 27 07:55 EDT 2017. Contains 288777 sequences.