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A153060 a(-1)=2, a(n)=a(n-1)^2-n. 6
4, 15, 223, 49726, 2472675072, 6114122011690205179, 37382487973834681475536573127118422035, 1397450407113894589170760370457882734663916414838438245542265330668373541218 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..7.

Index entries for sequences of form a(n+1)=a(n)^2 + ...

FORMULA

a(n) ~ c^(2^n), where c = 3.8643187364012066048723545708047003493006832597186603613771125549936188672... . - Vaclav Kotesovec, Dec 18 2014

MATHEMATICA

a=2; lst={}; Do[a=a^2-n; AppendTo[lst, a], {n, 0, 10}]; lst

RecurrenceTable[{a[0]==4, a[n]==a[n-1]^2-n}, a, {n, 0, 10}] (* Vaclav Kotesovec, Dec 18 2014 *)

CROSSREFS

Sequence in context: A277509 A195569 A118908 * A139244 A090115 A051999

Adjacent sequences:  A153057 A153058 A153059 * A153061 A153062 A153063

KEYWORD

nonn

AUTHOR

Vladimir Joseph Stephan Orlovsky, Dec 17 2008

STATUS

approved

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Last modified May 24 06:53 EDT 2019. Contains 323529 sequences. (Running on oeis4.)