Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row and column sum 2 4 5 or 7 and every diagonal and antidiagonal sum not 2 4 5 or 7.
A251916
Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row and column sum 2 4 5 or 7 and every diagonal and antidiagonal sum not 2 4 5 or 7.
Terms
- a(0) =1194a(1) =1914a(2) =2524a(3) =3260a(4) =5810a(5) =8932a(6) =12872a(7) =21518a(8) =33814a(9) =52274a(10) =97880a(11) =163006a(12) =292472a(13) =517966a(14) =988740a(15) =1737754a(16) =3522210a(17) =6326974a(18) =12849382a(19) =23480004a(20) =48494960a(21) =88704266a(22) =185430256a(23) =340660550a(24) =713811996a(25) =1315598042a(26) =2766156180a(27) =5101490134
External references
- oeis: A251916