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A144746 a(n) = a(n-1)^2 - a(n-1) - 1, a(0)=6. 5

%I #19 May 25 2019 01:26:49

%S 6,29,811,656909,431528777371,186217085698878552894269,

%T 34676803006183479266409218250231853558140150091,

%U 1202480666729655584789949373132702064208272454072740050128160074167965751208292536045867158189

%N a(n) = a(n-1)^2 - a(n-1) - 1, a(0)=6.

%C a(0)=3 is the smallest integer generating an increasing sequence of the form a(n) = a(n-1)^2 - a(n-1) - 1, cf. A144743.

%F a(n) = a(n-1)^2 - a(n-1) - 1 and a(0)=6.

%F a(n) ~ c^(2^n), where c = 5.33565954034691307256446890777476398311129407641143635105306409567572... . - _Vaclav Kotesovec_, May 06 2015

%t NestList[#^2-#-1&,6,8] (* _Harvey P. Dale_, Jan 22 2011 *)

%o (PARI) a(n, s=6)={for(i=1, n, s=s^2-s-1);s} \\ _M. F. Hasler_, Oct 06 2014

%Y Cf. A000058, A082732, A144743, A144744, A144745, A144747, A144748.

%K nonn

%O 0,1

%A _Artur Jasinski_, Sep 20 2008

%E Corrected and edited by _M. F. Hasler_, Oct 06 2014

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Last modified March 29 06:44 EDT 2024. Contains 371265 sequences. (Running on oeis4.)