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1, 3, 225, 250047, 4228250625, 1120413075641343, 4715453174592516890625, 316777275155162685106909462527, 340240830764391036687105719527812890625, 5845805845679338940092384222659294205213252255743, 1606922719369349023077959288770050490334792256259918212890625
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,2
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LINKS
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FORMULA
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(4^n - 1)^n
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EXAMPLE
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a(3) = 63^3 = 250047.
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PROG
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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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