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A001042
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a(n) = a(n-1)^2 - a(n-2)^2.
(Formerly M0743 N0279)
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2
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1, 2, 3, 5, 16, 231, 53105, 2820087664, 7952894429824835871, 63248529811938901240357985099443351745, 4000376523371723941902615329287219027543200136435757892789536976747706216384
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| The next term has 152 digits. - Franklin T. Adams-Watters (FrankTAW(AT)Netscape.net), Jun 11 2009
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REFERENCES
| Archimedeans Problems Drive, Eureka, 27 (1964), 6.
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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LINKS
| A. V. Aho and N. J. A. Sloane, Some doubly exponential sequences, Fib. Quart., 11 (1973), 429-437.
Index entries for sequences of form a(n+1)=a(n)^2 + ...
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CROSSREFS
| Cf. A001146, A000278, A000283, A058182, A007018.
Sequence in context: A111183 A192648 A048112 * A035089 A045313 A045314
Adjacent sequences: A001039 A001040 A001041 * A001043 A001044 A001045
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KEYWORD
| nonn,nice,easy
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), R. K. Guy
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EXTENSIONS
| More terms from James A. Sellers (sellersj(AT)math.psu.edu), Sep 19 2000
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