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0, 1, 1, 2, 2, 4, 4, 6, 2, 6, 8, 10, 16, 16, 4, 8, 32, 12, 64, 18, 6, 20, 128, 22, 4, 48, 6, 24, 256, 12, 512, 30, 16, 84, 8, 18, 1024, 256, 20, 24, 2048, 36, 4096, 66, 10, 324, 8192, 46, 8, 20, 48, 130, 16384, 28, 12, 70, 84, 800, 32768, 42, 65536, 1364, 18, 36, 32, 44, 131072, 216, 256, 40, 262144, 40, 524288, 3840, 12, 408, 16, 108
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,4
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LINKS
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PROG
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(PARI)
A064989(n) = {my(f); f = factor(n); if((n>1 && f[1, 1]==2), f[1, 2] = 0); for (i=1, #f~, f[i, 1] = precprime(f[i, 1]-1)); factorback(f)};
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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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