OFFSET
4,3
LINKS
Andrew Howroyd, Table of n, a(n) for n = 4..1278
R. C. Read, Contributions to the cell growth problem, Canad. J. Math., 14 (1962), 1-20.
FORMULA
T(n,k) = 0 for n > 4*k. - Andrew Howroyd, Oct 02 2017
EXAMPLE
Triangle starts:
1;
0, 12;
0, 18, 50;
0, 8, 154, 120;
0, 1, 212, 584, 230;
0, 0, 158, 1396, 1526, 388;
0, 0, 62, 2038, 5154, 3276, 602;
0, 0, 12, 1952, 11328, 14192, 6194, 880;
...
CROSSREFS
KEYWORD
AUTHOR
N. J. A. Sloane, Feb 05 2001
EXTENSIONS
Terms a(32) and beyond from Andrew Howroyd, Oct 02 2017
STATUS
approved