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A139248
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Triangle read by rows: row n lists the proper divisors of n-th even superperfect number A061652(n).
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1
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1, 1, 2, 1, 2, 4, 8, 1, 2, 4, 8, 16, 32, 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768, 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536, 131072, 1, 2, 4, 8, 16
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OFFSET
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1,3
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COMMENTS
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Also, row n list the proper divisors of n-th superperfect number A019279(n), if there are no odd superperfect numbers.
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LINKS
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EXAMPLE
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Triangle begins:
1
1, 2
1, 2, 4, 8
1, 2, 4, 8, 16, 32
1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048
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CROSSREFS
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Cf. A000043, A000668, A018254, A018487, A019279, A061652, A090748, A133024, A133025, A133031, A133049, A135652, A135653, A135654, A135655, A139246.
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KEYWORD
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nonn,tabf
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AUTHOR
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STATUS
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approved
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