>>16752434
https://www.wolframalpha.com/input?i=Sum%5B%2810%5E2%5E%28n+-+1%29+-+1%29%2F%289+10%5E%282%5E%28n+-+1%29+%2B+n+-+2%29%29%2C+%7Bn%2C+1%2C+12%7D%5D