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Search: id:A098706
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A098706 a(n)=2*A076218(n); alternatively, a(0)=0, a(1)=2; for n>1, a(n)=2*A001653(n-2)*A001653(n-1). +0
1
0, 2, 10, 290, 9802, 332930, 11309770, 384199202, 13051463050, 443365544450, 15061377048202, 511643454094370, 17380816062160330, 590436102659356802, 20057446674355970890, 681362750825443653410, 23146276081390728245002 (list; graph; listen)
OFFSET

0,2

FORMULA

For n>1, a(n)=A002315(n-2)*A002315(n-1)+3. For n>0, a(n)=(A001542(n-1)-1)^2+(A001542(n-1)-1)^2.

EXAMPLE

a(3)=2*5*29=2*145

CROSSREFS

Sequence in context: A074056 A003047 A028580 this_sequence A073834 A111837 A092123

Adjacent sequences: A098703 A098704 A098705 this_sequence A098707 A098708 A098709

KEYWORD

nonn

AUTHOR

Charlie Marion (charliemath(AT)optonline.net), Oct 28 2004

EXTENSIONS

More terms from Ray Chandler (rayjchandler(AT)sbcglobal.net), Nov 10 2004

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Last modified July 24 12:00 EDT 2008. Contains 142294 sequences.


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