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Search: id:A001381
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| A001381 |
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Weight distribution of binary [ 48,24,12 ] quadratic residue code. |
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+0
1
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| 1, 0, 0, 17296, 535095, 3995376, 7681680, 3995376, 535095, 17296, 0, 0, 1
(list; graph; listen)
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OFFSET
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0,4
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REFERENCES
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F. J. MacWilliams and N. J. A. Sloane, The Theory of Error-Correcting Codes, Elsevier-North Holland, 1978, p. 494, 604.
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EXAMPLE
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x^48 + 17296*x^36*y^12 + 535095*x^32*y^16 + 3995376*x^28*y^20 + 7681680*x^24*y^24 + 3995376*x^20*y^28 + 535095*x^16*y^32 + 17296*x^12*y^36 + y^48.
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PROGRAM
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(MAGMA) C:=QRCode(GF(2), 47); D:=ExtendCode(C); W<x, y>:=WeightEnumerator(D); W;
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CROSSREFS
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Adjacent sequences: A001378 A001379 A001380 this_sequence A001382 A001383 A001384
Sequence in context: A076774 A094413 A093790 this_sequence A023942 A034624 A043599
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KEYWORD
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nonn,fini,full
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AUTHOR
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njas
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