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A264610 a(0)=1; thereafter a(n) = -Sum_{i=1..n} a(n-i)^(2^i). 2
1, -1, -2, -6, -54, -4470, -30229110, -1388162822415990, -2926650008246700930753649260150, -13001299396349738096788020339357180951040927696209747704510070 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..9.

MAPLE

f:=proc(n) option remember;

if n=0 then 1 else -add(f(n-i)^(2^i), i=1..n); fi; end;

[seq(f(n), n=0..4)];

CROSSREFS

Equals A260685(2^n).

Sequence in context: A306021 A122593 A267348 * A153450 A179389 A084123

Adjacent sequences:  A264607 A264608 A264609 * A264611 A264612 A264613

KEYWORD

sign

AUTHOR

N. J. A. Sloane, Nov 25 2015

STATUS

approved

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Last modified November 22 10:59 EST 2019. Contains 329389 sequences. (Running on oeis4.)