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A264933
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a(0)=0; a(1)=1; a(2)=2; a(n) = a(n-1)^a(n-2)^a(n-3).
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0
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OFFSET
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0,3
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LINKS
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EXAMPLE
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a(3) = a(2)^a(1)^a(0) = 2;
a(4) = a(3)^a(2)^a(1) = 2^2^1 = 4;
a(5) = a(4)^a(3)^a(2) = 4^2^2 = 256;
a(6) = a(5)^a(4)^a(3) = 256^4^2 = 340282366920938463463374607431768211456.
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MATHEMATICA
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RecurrenceTable[{a[0]==0, a[1]==1, a[2]==2, a[n]==a[n-1]^a[n-2]^a[n-3]}, a, {n, 6}]
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PROG
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(Magma) I:=[0, 1, 2]; [n le 2 select I[n] else Self(n-1)^Self(n-2)^Self(n-3): n in [0..6]];
(PARI) a(n) = if(n<3, n, a(n-1)^a(n-2)^a(n-3));
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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