Number of n X n arrays of squares of integers summing to 18 with every element equal to at least one neighbor.
A146506
Number of n X n arrays of squares of integers summing to 18 with every element equal to at least one neighbor.
Terms
- a(0) =4a(1) =90a(2) =12424a(3) =2808172a(4) =449235282a(5) =107282960684
External references
- oeis: A146506