(e,n) = (1,1)

1, 5, 13, 25, 41,..

which are the sums of consecutive squares.

(1+0 = 1) (1+4=5) (4+9=13) (9+16=25)..

(e,n) = (2,1)

1, 3, 9, 19, 33,..

are sums of the same square plus one

1 = 0+0+1, 3 = 1+1+1, 9 = 4+4+1, 19 = 9+9+1, 33 = 16+16+1.

(3,1)

2,6,14,26,42

sum of consecutive squares plus one.

(4,1)

2,4,10,20,34,

sums of the same square plus two.

>>7581

If e is even, the a values in (e,1) are equal to sums of the same square plus e/2. If e is odd, the a values in (e,1) are equal to the sum of consecutive squares plus (e-1)/2. You find na, nb and cN in (e,1), which means each of these shares the same property based on these rules.