OFFSET
0,5
FORMULA
T(n,k) = T(k,n).
EXAMPLE
Square array begins:
1, 1, 1, 1, 1, ...
1, 6, 29, 139, 666, ...
1, 29, 500, 8329, 138301, ...
1, 139, 8329, 463736, 25543057, ...
1, 666, 138301, 25543057, 4614756624, ...
PROG
(PARI) default(realprecision, 120);
{T(n, k) = round(prod(a=1, n, prod(b=1, k, 4*sin(a*Pi/(2*n+1))^2+4*sin(b*Pi/(2*k+1))^2)))}
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Seiichi Manyama, Jan 09 2021
STATUS
approved