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A115776
Integers i such that 13*i = A048720bi(21,i), but 15*i <> A048720bi(23,i).
4
15, 30, 31, 45, 47, 60, 61, 62, 63, 90, 94, 95, 120, 122, 124, 125, 126, 127, 165, 173, 175, 180, 181, 188, 189, 190, 191, 240, 244, 245, 248, 250, 252, 253, 254, 255, 330, 346, 350, 351, 360, 362, 376, 378, 380, 381, 382, 383, 480, 488, 490, 496, 500
OFFSET
1,1
COMMENTS
Here * stands for ordinary multiplication and A048720 is the carryless (GF(2)[X]) multiplication.
CROSSREFS
Cf. Setwise difference of A115772 and A115774. A115781 shows this sequence in binary.
Sequence in context: A040210 A296758 A297285 * A095783 A348556 A067400
KEYWORD
nonn
AUTHOR
Antti Karttunen, Jan 30 2006
STATUS
approved