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1, 1, 4, 1, 4, 4, 16, 1, 4, 4, 16, 4, 16, 16, 64, 1, 4, 4, 16, 4, 16, 16, 64, 4, 16, 16, 64, 16, 64, 64, 256, 1, 4, 4, 16, 4, 16, 16, 64, 4, 16, 16, 64, 16, 64, 64, 256, 4, 16, 16, 64, 16, 64, 64, 256, 16, 64, 64, 256, 64, 256, 256, 1024, 1, 4, 4, 16, 4, 16, 16, 64, 4, 16, 16, 64, 16, 64
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,3
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LINKS
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Table of n, a(n) for n=1..77.
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EXAMPLE
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Contribution from Omar E. Pol, Jul 21 2009: (Start)
If written as a triangle:
1;
1,4;
1,4,4,16;
1,4,4,16,4,16,16,64;
1,4,4,16,4,16,16,64,4,16,16,64,16,64,64,256;
1,4,4,16,4,16,16,64,4,16,16,64,16,64,64,256,4,16,16,64,16,64,64,256,16,64,...
(End)
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MAPLE
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Cf. A048896, A147610, A151780.
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CROSSREFS
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Cf. A000302, A102376. [From Omar E. Pol, Jul 21 2009]
Sequence in context: A035646 A144034 A204714 * A093561 A081773 A167431
Adjacent sequences: A151780 A151781 A151782 * A151784 A151785 A151786
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane, Jun 25 2009
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STATUS
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approved
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