A109778 G.f. = 18th root of Hamming weight enumerator of [18,9,8]_4 self-dual code S_18 over GF(4) (cf. A014487).

1, 0, 0, 0, 0, 0, 0, 0, 153, 0, 1020, 0, 4284, 0, 6120, 0, -196146, 0, -2652864, 0, -19986084, 0, -90202680, 0, 85692546, 0, 6608267064, 0, 76663736316, 0, 545345198712, 0, 2029226503266, 0, -9086615598096, 0, -245241505186236, 0, -2527595927294760, 0, -16280108470658466

Offset

0,9

Links

Table of n, a(n) for n=0..40.

N. Heninger, E. M. Rains and N. J. A. Sloane, On the Integrality of n-th Roots of Generating Functions, J. Combinatorial Theory, Series A, 113 (2006), 1732-1745.

Crossrefs

Sequence in context: A157881 A370312 A099117 * A156740 A095226 A346630

Adjacent sequences: A109775 A109776 A109777 * A109779 A109780 A109781

Keyword

sign

Author

N. J. A. Sloane and Nadia Heninger, Aug 16 2005

Status

approved