A115776 - OEIS

A115776

Integers i such that 13*i = A048720bi(21,i), but 15*i <> A048720bi(23,i).

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

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OFFSET

1,1

COMMENTS

Here * stands for ordinary multiplication and A048720 is the carryless (GF(2)[X]) multiplication.

LINKS

Table of n, a(n) for n=1..53.

Index entries for sequences operating on GF(2)[X]-polynomials

CROSSREFS

Cf. Setwise difference of A115772 and A115774. A115781 shows this sequence in binary.

Sequence in context: A040210 A296758 A297285 * A095783 A348556 A067400

Adjacent sequences: A115773 A115774 A115775 * A115777 A115778 A115779

KEYWORD

nonn

AUTHOR

Antti Karttunen, Jan 30 2006

STATUS

approved