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Search: id:A000304
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| 2, 3, 6, 18, 108, 1944, 209952, 408146688, 85691213438976, 34974584955819144511488, 2997014624388697307377363936018956288
(list; graph; listen)
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OFFSET
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2,1
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FORMULA
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For n>=4, a(n) = 2^A000045(n-3)*3^A000045(n-2) - Benoit Cloitre (benoit7848c(AT)orange.fr), Sep 26 2003
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MAPLE
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A000304 := proc(n) option remember; if n <=3 then n else A000304(n-1)*A000304(n-2); fi; end;
a[0]:=2: a[1]:=3: for n from 2 to 13 do a[n]:=a[n-1]*a[n-2] od: seq(a[n], n=0..10); # [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Mar 19 2009]
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CROSSREFS
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Adjacent sequences: A000301 A000302 A000303 this_sequence A000305 A000306 A000307
Sequence in context: A072241 A093468 A114302 this_sequence A000614 A018290 A121959
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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