Number of n X n arrays of squares of integers summing to 21 with every element equal to at least one neighbor.
A146515
Number of n X n arrays of squares of integers summing to 21 with every element equal to at least one neighbor.
Terms
- a(0) =0a(1) =92a(2) =17216a(3) =5077564a(4) =1460980380a(5) =540147070759
External references
- oeis: A146515