card{(a,b,c): a,b,c€N; a+b>c, a+c>b, b+c>a; a<b<c<n}=n(n+2)(2n+5)/24 when n is even number;
card{(a,b,c): a,b,c€N; a+b>c, a+c>b, b+c>a; a<b<c<n}=(n+1)(n+3)(2n+1)/24 when n is odd number.
Emzari Papava