By Nossirahdrof

WTH/HGT ISOM->LENGTH - WTH*HGT*4 = NUMBER
-----------------------------------------------------
256/256 ISOM->265244 - 256*256*4 = 3200
192/192 ISOM->149768 - 192*192*4 = 2312
128/128 ISOM-> 67080 - 128*128*4 = 1544
96 / 96 ISOM-> 38024 - 96 * 96*4 = 1160
64 / 64 ISOM-> 17160 - 64 * 64*4 = 777
96 / 64 ISOM-> 25480 - 96 * 64*4 = 904
64 / 96 ISOM-> 25608 - 64 * 96*4 = 1032
128/ 64 ISOM-> 33800 - 128* 64*4 = 1032
64 /128 ISOM-> 34056 - 64 *128*4 = 1288
192/ 64 ISOM-> 50440 - 192* 64*4 = 1288
64 /192 ISOM-> 50696 - 64 *192*4 = 1544
256/ 64 ISOM-> 67080 - 256* 64*4 = 1544
64 /256 ISOM-> 67848 - 64 *256*4 = 2312