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A062000
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a(n)=a(n-1)^2-a(n-2)^2.
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2
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0, 2, 4, 12, 128, 16240, 263721216, 69548879504781056, 4837046640370554355727482727956480, 23397020201120067002755280700388456275000098577861376610994277515264
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| a(3)=4^2-2^2=12
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LINKS
| Harry J. Smith, Table of n, a(n) for n=0,...,12
Index entries for sequences of form a(n+1)=a(n)^2 + ...
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FORMULA
| a(n)=2*A061999(n)
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PROG
| (PARI) { for (n=0, 12, if (n>1, a=a1^2 - a2^2; a2=a1; a1=a, if (n==0, a=a2=0, a=a1=2)); write("b062000.txt", n, " ", a) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Jul 29 2009]
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CROSSREFS
| Cf. A001042 and A057078 have the same recurrence.
Sequence in context: A001696 A013333 A154882 * A053040 A154734 A059085
Adjacent sequences: A061997 A061998 A061999 * A062001 A062002 A062003
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KEYWORD
| nonn
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AUTHOR
| Henry Bottomley (se16(AT)btinternet.com), May 29 2001
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EXTENSIONS
| First term corrected by Harry J. Smith (hjsmithh(AT)sbcglobal.net), Jul 29 2009
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