OFFSET
1,1
COMMENTS
N2×8(r+2, 2r+1; r, 0, 1, r) r>=1. (Siap-Aydogdu Table 1)
LINKS
Lars Blomberg, Table of n, a(n) for n = 1..30
I. Siap and I. Aydogdu, Counting The Generator Matrices of Z_2 Z_8 Codes, arXiv preprint arXiv:1303.6985 [math.CO], 2013.
MATHEMATICA
QP = QPochhammer;
a[n_] := (2^(2n+1)(8^(n+1))^n (2^(2n+1)-1) QP[2^(-2-n), 2, n] QP[4^-n, 2, n])/((2^(n+1))^n QP[2^(-n), 2, n]^2 2^(n-1));
Array[a, 8] (* Jean-François Alcover, Sep 01 2018 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jun 02 2013
EXTENSIONS
Terms a(4) and beyond from Lars Blomberg, Jun 14 2017
STATUS
approved