OFFSET
0,3
EXAMPLE
a(2) = 2:
[1, 0;
0, 2]
a(3) = 86:
[0, 3, 4;
3, 1, 5;
4, 5, 2]
CROSSREFS
KEYWORD
nonn,hard,more
AUTHOR
Stefano Spezia, Dec 02 2022
STATUS
approved