i am not able to solve this question because the space between the numbers 1 to 1 is not consistent like for n = 4 space = 5 and for n = 5 space = 7 and i am not able to find the relation of space with the number

i am not able to solve this question because the space between the numbers 1 to 1 is not consistent like for n = 4 space = 5 and for n = 5 space = 7 and i am not able to find the relation of space with the number
