You can get similar seeds that produce the same effect by adding or subtracting a factor of 281474976710656 to the number (as in calculation, not in concatenation). Sample seeds that produce the same effect: -174436595872572 388513357548740
-117163709839622 445786243581690
There are in total 131,072 seeds (65,536 for each axis) that are affected.
Ettanin
You can get similar seeds that produce the same effect by adding or subtracting a factor of 281474976710656 to the number (as in calculation, not in concatenation).
Sample seeds that produce the same effect:
-174436595872572
388513357548740
-117163709839622
445786243581690
There are in total 131,072 seeds (65,536 for each axis) that are affected.