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A151783
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a(n) = 4^(wt(n) - 1) where wt(n) = A000120(n).
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4
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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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EXAMPLE
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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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PROG
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(Python 3.10+)
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CROSSREFS
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A102376 is a very similar sequence.
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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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