OFFSET
1,2
EXAMPLE
a(2) = -7:
[1, 3;
3, 2]
.
a(3) = -152:
[5, 4, 1;
4, 2, 6;
1, 6, 3]
.
a(4) = -6276:
[9, 5, 2, 4;
5, 6, 10, 1;
2, 10, 3, 7;
4, 1, 7, 8]
.
a(5) = -550010:
[ 3, 14, 7, 13, 9;
14, 8, 1, 12, 4;
7, 1, 6, 10, 15;
13, 12, 10, 2, 11;
9, 4, 15, 11, 5]
.
a(6) = -94974369:
[ 5, 14, 7, 11, 21, 17;
14, 12, 19, 3, 16, 1;
7, 19, 13, 18, 2, 6;
11, 3, 18, 10, 4, 20;
21, 16, 2, 4, 9, 15;
17, 1, 6, 20, 15, 8]
CROSSREFS
KEYWORD
sign,hard,more
AUTHOR
Hugo Pfoertner at the suggestion of Markus Sigg, Feb 15 2022
STATUS
approved