Number of (n+2)X(3+2) 0..3 arrays with every 3X3 subblock row and column sum 1 3 6 or 8 and every diagonal and antidiagonal sum not 1 3 6 or 8.
A252010
Number of (n+2)X(3+2) 0..3 arrays with every 3X3 subblock row and column sum 1 3 6 or 8 and every diagonal and antidiagonal sum not 1 3 6 or 8.
Terms
- a(0) =1110a(1) =1406a(2) =1434a(3) =2170a(4) =4770a(5) =8930a(6) =14450a(7) =33530a(8) =63546a(9) =103410a(10) =245210a(11) =469018a(12) =766066a(13) =1846586a(14) =3555450a(15) =5822514a(16) =14197274a(17) =27460186a(18) =45050098a(19) =110701178a(20) =214764474a(21) =352750770a(22) =871224410a(23) =1693530778a(24) =2783756146a(25) =6897870266
External references
- oeis: A252010