How many arrangements of the numbers 1, 2, 3, ..., 7, 8, 9 are there where the sum of any two adjacent numbers is odd?
Hopefully, this will help:
https://web2.0calc.com/questions/counting_31398
Answer: if 1 + 1 = 2 then a + b = c therefore I don't know what your answer is buuuuuuuuuut If you use this then you COULD find the answer https://tinyurl.com/58eadpaj
Kinda sus man!!!!
Lol sus
+579 
