Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 3 5 6 or 8 and every 3X3 diagonal and antidiagonal sum equal to 0 3 5 6 or 8.
A252345
Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 3 5 6 or 8 and every 3X3 diagonal and antidiagonal sum equal to 0 3 5 6 or 8.
Terms
- a(0) =562a(1) =798a(2) =1331a(3) =2176a(4) =4013a(5) =7109a(6) =12670a(7) =23051a(8) =42677a(9) =76847a(10) =144622a(11) =269725a(12) =498250a(13) =941982a(14) =1789811a(15) =3325857a(16) =6370800a(17) =12178628a(18) =22845814a(19) =43963436a(20) =84669873a(21) =159459251a(22) =308410785a(23) =596046949a(24) =1127115248a(25) =2185125529a(26) =4236058398
External references
- oeis: A252345