Number of n X n arrays of squares of integers with every (n-2)X(n-2) subblock summing to 4.
A159357
Number of n X n arrays of squares of integers with every (n-2)X(n-2) subblock summing to 4.
Terms
- a(0) =13a(1) =3223a(2) =120420a(3) =1313859a(4) =7979037a(5) =34212213a(6) =116257928a(7) =334277285a(8) =847224269a(9) =1945263907a(10) =4124812588a(11) =8191927383a(12) =15400417725a(13) =27631699329a(14) =47624056752a(15) =79259627513a(16) =127918067213a(17) =200906501615a(18) =307976018164a(19) =461935595947
External references
- oeis: A159357