Number of n X n arrays of squares of integers with every (n-3) X (n-3) subblock summing to 4 and every element equal to at least one neighbor.
A146123
Number of n X n arrays of squares of integers with every (n-3) X (n-3) subblock summing to 4 and every element equal to at least one neighbor.
Terms
- a(0) =1a(1) =540a(2) =4120a(3) =12188a(4) =31000a(5) =67216a(6) =129464a(7) =228136a(8) =375388a(9) =585140a(10) =873076a(11) =1256644a(12) =1755056a(13) =2389288a(14) =3182080a(15) =4157936a(16) =5343124a(17) =6765676a(18) =8455388a(19) =10443820a(20) =12764296a(21) =15451904
External references
- oeis: A146123