, n. n , , 3 2 , ,
, : ,
" " , , , , . , . , , , .
, (n1,n2,n3), n1 + n2 + n3 = n n1, n2, n3 (> = 2) n >= 7 n1 <= n2 <= n3
:

- (n1,n2,n3), , . n_s = n1 + n2. n_s > n3 , n_s n3
, angular ( ).
n4 x n3 angular, :
n4 = n - 2 * n3 \\if following the depicted example
(n41, n42, n43) ( n n = n4, n3> = 7) (n31, n32, n33) ( n n = n3, n3> = 7). , n_s3 == n_s4 , .
:
, x3 = 17 x4 = 13
Enumeration of x3 = 17:
2 + 2 + 13
3 + 3 + 11
5 + 5 + 7
Enumeration of x_s3:
4 = 2 + 2
6 = 3 + 3
10 = 5 + 5
12 = 5 + 7
14 = 3 + 11
15 = 2 + 13
Enumeration of x4 = 13:
2 + 2 + 7
3 + 5 + 5
Enumeration of x_s4:
4 = 2 + 2
8 = 3 + 5
9 = 2 + 7
10 = 5 + 5
10 , 13 17, 10 10 ( angular), , , ( ) .
.