As you move down, the numbers represent multiples of 12,subtracting 1 for the first step,adding 2 for the second, subtracting 3 for the third, adding 4 for the next ect.ect
The 84th Amendment Act has frozen the total number of existing seats in the Lok Sabha on the basis of 1971 Census. They shall remain unaltered till the first Census to be taken after the year: