OFFSET
0,5
COMMENTS
The first 4 rows were provided by Wouter Meeussen.
LINKS
Minfeng Wang, Table of n, a(n) for n = 0..118
EXAMPLE
a(4) = T(2,1) = 3 because there are 3 different (0,1)-matrices with determinant=1:
((1,0),(0,1)), ((1,1),(0,1)), ((1,0),(1,1)).
Triangle T(n,k) begins:
0, 1;
1, 1;
10, 3;
338, 84, 3;
42976, 10020, 1200, 60;
21040112, 4851360, 1213920, 144720, 43560, 3600;
...
PROG
(Fortran)
c See link in A086264.
CROSSREFS
KEYWORD
nonn,hard,tabf
AUTHOR
Hugo Pfoertner, Nov 04 2003
EXTENSIONS
Edited by Alois P. Heinz, Dec 20 2023
STATUS
approved