rz( 3): (t= 3) [ 0, 2, 3] (sum =   6)
rz( 4): (t= 4) [ 0, 2, 3, 4] (sum =  10)
rz( 5): (t= 4) [ 0, 3, 4, 5] (sum =  10)
rz( 6): (t= 4) [ 0, 2, 5, 6] (sum =  10)
rz( 7): (t= 5) [ 0, 4, 5, 6, 7] (sum =  15)
rz( 8): (t= 5) [ 0, 3, 6, 7, 8] (sum =  15)
rz( 9): (t= 5) [ 0, 2, 5, 8, 9] (sum =  15)
rz(10): (t= 6) [ 0, 4, 7, 8, 9,10] (sum =  21)
rz(11): (t= 6) [ 0, 2, 7, 8,10,11] (sum =  21)
rz(12): (t= 6) [ 0, 1, 2, 6, 9,12] (sum =  21)
rz(13): (t= 6) [ 0, 1, 2, 6,10,13] (sum =  21)
rz(14): (t= 7) [ 0, 1, 2, 7,10,11,14] (sum =  28)
rz(15): (t= 7) [ 0, 1, 2, 3, 8,11,15] (sum =  28)
rz(16): (t= 7) [ 0, 1, 2, 3, 8,12,16] (sum =  28)
rz(17): (t= 7) [ 0, 1, 2, 3, 8,13,17] (sum =  28)
rz(18): (t= 8) [ 0, 1, 2, 3, 4,10,13,18] (sum =  36)
rz(19): (t= 8) [ 0, 1, 2, 3, 4,10,14,19] (sum =  36)
rz(20): (t= 9) [ 0, 1, 2, 3, 4, 5,13,14,20] (sum =  45)
rz(21): (t= 9) [ 0, 1, 2, 3, 4, 5, 6,14,21] (sum =  45)
