Number of 9 X 9 arrays of squares of integers, symmetric about main diagonal, with all rows summing to n.
A156398
Number of 9 X 9 arrays of squares of integers, symmetric about main diagonal, with all rows summing to n.
Terms
- a(0) =1a(1) =2620a(2) =708256a(3) =24243520a(4) =154294582a(5) =253938600a(6) =1164072896a(7) =10953612400a(8) =25250999564a(9) =22620401127a(10) =101930271184a(11) =570443632816a(12) =781505368112a(13) =474109634808
External references
- oeis: A156398