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A056235 n*2^(n*2^n+n)-1. 0
7, 2047, 402653183, 1180591620717411303423, 233840261972944466912589573234605283144949206876159 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

For n>2, a(n) is base at which zero is reached for the function "write f(j) in base j, read as base j+1 and then subtract 1 to give f(j+1)" starting from f(n)=2n^2-1.

LINKS

Table of n, a(n) for n=1..5.

FORMULA

a(n) =A003261(A036289(n)) =A036289(n)*A001146(n)^n-1

EXAMPLE

a(3)=3*2^(3*2^3+3)-1=3*2^27-1=402653184-1=402653183

CROSSREFS

Sequence in context: A145253 A248730 A024099 * A139299 A004818 A125538

Adjacent sequences:  A056232 A056233 A056234 * A056236 A056237 A056238

KEYWORD

nonn

AUTHOR

Henry Bottomley, Aug 06 2000

STATUS

approved

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Last modified March 23 04:46 EDT 2019. Contains 321422 sequences. (Running on oeis4.)