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A001382 Weight distribution of ternary [ 24,12,9 ] quadratic residue code (also of Pless symmetry code). 1
1, 0, 0, 4048, 61824, 242880, 198352, 24288, 48 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

REFERENCES

F. J. MacWilliams and N. J. A. Sloane, The Theory of Error-Correcting Codes, Elsevier-North Holland, 1978, p. 620.

LINKS

Table of n, a(n) for n=0..8.

G. Nebe, E. M. Rains and N. J. A. Sloane, Self-Dual Codes and Invariant Theory, Springer, Berlin, 2006.

EXAMPLE

x^24 + 4048*x^15*y^9 + 61824*x^12*y^12 + 242880*x^9*y^15 + 198352*x^6*y^18 + 24288*x^3*y^21 + 48*y^24.

PROG

(MAGMA) C:=QRCode(GF(3), 23); D:=ExtendCode(C); W<x, y>:=WeightEnumerator(D); W;

CROSSREFS

Cf. A112641 (cyclic version).

Sequence in context: A237030 A252809 A202313 * A090058 A251032 A035782

Adjacent sequences:  A001379 A001380 A001381 * A001383 A001384 A001385

KEYWORD

nonn,fini,full

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified November 20 13:14 EST 2019. Contains 329336 sequences. (Running on oeis4.)