Number of n X n arrays of squares of integers, symmetric under 90 degree rotation, with all rows summing to 8.
A156447
Number of n X n arrays of squares of integers, symmetric under 90 degree rotation, with all rows summing to 8.
Terms
- a(0) =1a(1) =0a(2) =2a(3) =2a(4) =24a(5) =60a(6) =1483a(7) =10236a(8) =175765a(9) =2771020a(10) =133072650a(11) =2511725250a(12) =142353126510
External references
- oeis: A156447