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A097937 Weight distribution of [138,69,22] binary extended quadratic-residue (or QR) code. 2

%I #30 Mar 22 2024 19:37:45

%S 1,0,0,0,0,0,0,0,0,0,0,321402,2356948,21533934,490138050,6648307504,

%T 77865259035,771068968365,6551964560395,48016671847203,

%U 304734017875437,1682222779056949,8108674129521168,34244594187642954,127081843539044182,415479348655935216

%N Weight distribution of [138,69,22] binary extended quadratic-residue (or QR) code.

%C Taken from the Tjhai-Tomlinson website. [This refers to the second table, which is not correct. The first table is correct and taken from the arXiv article.]

%C The arXiv article provides a corrected table, see link. - _Hugo Pfoertner_, Mar 11 2020

%H C. J. Tjhai and Martin Tomlinson, <a href="http://www.tech.plym.ac.uk/Research/fixed_and_mobile_communications/links/weightdistributions.htm">Weight Distributions of Quadratic Residue and Quadratic Double Circulant Codes over GF(2)</a> [broken link]

%H C. Tjhai, M. Tomlinson, M. Ambroze, and M. Ahmed, <a href="https://arxiv.org/abs/0801.3926">On the Weight Distribution of the Extended Quadratic Residue Code of Prime 137</a>, arXiv:0801.3926 [cs.IT], 25 Jan 2008.

%H C. Tjhai, M. Tomlinson, M. Ambroze, and M. Ahmed, <a href="/A097937/a097937.txt">3rd column of Table 1 of arXiv:0801.3926</a>, 2008.

%e The weight distribution as given in the arXiv:0801.3926 article:

%e i A_i

%e 0 1

%e 22 321402

%e 24 2356948

%e 26 21533934

%e 28 490138050

%e 30 6648307504

%e 32 77865259035

%e 34 771068968365

%e 36 6551964560395

%e 38 48016671847203

%e 40 304734017875437

%e 42 1682222779056949

%e 44 8108674129521168

%e 46 34244594187642954

%e 48 127081843539044182

%e 50 415479348655935216

%e 52 1199437032565603086

%e 54 3063553566175154416

%e 56 6934772281891681524

%e 58 13932469221702235932

%e 60 24873788403009712900

%e 62 39500790442042374192

%e 64 55841886989113691343

%e 66 70316519062819817006

%e 68 78897731337990186714

%e 70 78897731337990186714

%e 72 70316519062819817006

%e 74 55841886989113691343

%e 76 39500790442042374192

%e 78 24873788403009712900

%e 80 13932469221702235932

%e 82 6934772281891681524

%e 84 3063553566175154416

%e 86 1199437032565603086

%e 88 415479348655935216

%e 90 127081843539044182

%e 92 34244594187642954

%e 94 8108674129521168

%e 96 1682222779056949

%e 98 304734017875437

%e 100 48016671847203

%e 102 6551964560395

%e 104 771068968365

%e 106 77865259035

%e 108 6648307504

%e 110 490138050

%e 112 21533934

%e 114 2356948

%e 116 321402

%e 118 1

%e ---

%e The following version, which was taken from the website of the authors, *is not correct*. It is given here in accordance with the OEIS policy of including incorrect versions if they were previously published on the OEIS.

%e i A_i

%e 0 1

%e 22 321402

%e 24 2356948

%e 26 21533934

%e 28 490138050

%e 30 6648307504

%e 32 77865259035

%e 34 771068968365

%e 36 6551964560395

%e 38 48016671847203

%e 40 304734017875437

%e 42 1682222779056949

%e 44 8108674129521168

%e 46 34244594187642952

%e 48 127081843539044176

%e 50 415479348655935232

%e 52 1199437032565603072

%e 54 3063553566175154176

%e 56 6934772281891681280

%e 58 13932469221702236160

%e 60 24873788403009712128

%e 62 39500790442042376192

%e 64 55841886989113688064

%e 66 70316519062819815424

%e 68 78897731337990193152

%e 70 78897731337990193152

%e 72 70316519062819815424

%e 74 55841886989113688064

%e 76 39500790442042376192

%e 78 24873788403009712128

%e 80 13932469221702236160

%e 82 6934772281891681280

%e 84 3063553566175154176

%e 86 1199437032565603072

%e 88 415479348655935232

%e 90 127081843539044176

%e 92 34244594187642952

%e 94 8108674129521168

%e 96 1682222779056949

%e 98 304734017875437

%e 100 48016671847203

%e 102 6551964560395

%e 104 771068968365

%e 106 77865259035

%e 108 6648307504

%e 110 490138050

%e 112 21533934

%e 114 2356948

%e 116 321402

%e 118 1

%Y Cf. A076710.

%K nonn,fini

%O 0,12

%A _N. J. A. Sloane_, Apr 02 2009

%E At the suggestion of _Hugo Pfoertner_, corrected by _Peter Luschny_, Mar 13 2020

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Last modified April 25 06:14 EDT 2024. Contains 371964 sequences. (Running on oeis4.)