OFFSET
1,1
COMMENTS
Zeros in the sequence denote increments in n; the j offset is zero.
These are intermediate results for constructing A093937 : W_n = Sum(a[n,j] * binomial(3 n^2 + n - j,3 n^2), j >= 0)
LINKS
Maxwell Hutchinson, Table of n, a(n) for n = 1..141
N. Destainville, R. Mosseri, and F. Bailly, A formula for the number of tilings of an octagon by rhombi, arXiv:math/0302105 [math.CO], 2003-2004.
EXAMPLE
The table begins:
n\j 0 1 2 3 4 5 6 7 8 ...
1 2 0
2 20 220 703 943 566 166 21 1 0
...
CROSSREFS
KEYWORD
nonn,hard,tabf
AUTHOR
Maxwell Hutchinson, Mar 17 2013
STATUS
approved