Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 2 5 6 or 7.
A252212
Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 2 5 6 or 7.
Terms
- a(0) =874a(1) =1212a(2) =1843a(3) =3147a(4) =5011a(5) =8178a(6) =14627a(7) =26610a(8) =50441a(9) =99604a(10) =200704a(11) =417343a(12) =882057a(13) =1884329a(14) =4067714a(15) =8836577a(16) =19282718a(17) =42207024a(18) =92542991a(19) =203209693a(20) =446662969a(21) =982320854a(22) =2161276673a(23) =4756530458a(24) =10470069046a(25) =23049757003
External references
- oeis: A252212