Number of n X n arrays of squares of integers with every (n-1)X(n-1) subblock summing to 4.
A159356
Number of n X n arrays of squares of integers with every (n-1)X(n-1) subblock summing to 4.
Terms
- a(0) =9a(1) =767a(2) =19252a(3) =182643a(4) =1036981a(5) =4279949a(6) =14199872a(7) =40175697a(8) =100665373a(9) =229182711a(10) =482835464a(11) =954070027a(12) =1786340817a(13) =3194495053a(14) =5490736316a(15) =9117102929a(16) =14685469857a(17) =23026155487a(18) =35246287308a(19) =52799153171a(20) =77565837469
External references
- oeis: A159356