OFFSET
1,2
COMMENTS
For more information, links, programs see A098485.
LINKS
Alois P. Heinz, Table of n, a(n) for n = 1..231
EXAMPLE
T(3,3)=a(6)=8 because there are the following 8 ways to pick 3 positions isolated from each other from a 3 X 3 square array:
X0X...X0X...X0X...X00...X00...0X0...00X...00X
000...000...000...00X...000...000...X00...000
X00...0X0...00X...X00...X0X...X0X...00X...X0X
Triangle begins:
1;
4, 0;
9, 16, 8;
16, 78, 140, 79;
25, 228, 964, 1987, 1974;
36, 520, 3920, 16834, 42368, 62266;
49, 1020, 11860, 85275, 397014, 1220298, 2484382;
64, 1806, 29708, 317471, 2326320, 12033330, 44601420, 119138166;
PROG
See link in A098485.
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Hugo Pfoertner, Sep 15 2004
EXTENSIONS
T(8,8) corrected by Alois P. Heinz, May 11 2017
STATUS
editing