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A236845
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Numbers that occur in more than one way as results of "upward" remultiplication (GF(2)[X] -> N) of some number.
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5
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91, 117, 143, 171, 182, 234, 247, 273, 286, 333, 342, 351, 361, 364, 369, 429, 451, 468, 471, 494, 501, 513, 539, 546, 572, 609, 637, 666, 675, 684, 687, 702, 721, 722, 728, 738, 741, 803, 819, 847, 858, 902, 936, 942, 949, 957, 981, 988, 999, 1001, 1002, 1026, 1053, 1078, 1083, 1092, 1107, 1125
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OFFSET
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1,1
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COMMENTS
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Numbers that occur more than once in A234742.
Those terms that encode an irreducible polynomial in ring GF(2)[X] with their binary representation (that is, those that are in A014580) seem to occur also all in A091214 (that is, are a subsequence of the latter).
If n is a term, then 2n is also a term.
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LINKS
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PROG
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CROSSREFS
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Positions of terms larger than one in A236853.
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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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