Number of (n+2) X (2+2) 0..3 arrays with every 3 X 3 subblock row and column sum not 2 3 6 or 7 and every diagonal and antidiagonal sum 2 3 6 or 7.
A251888
Number of (n+2) X (2+2) 0..3 arrays with every 3 X 3 subblock row and column sum not 2 3 6 or 7 and every diagonal and antidiagonal sum 2 3 6 or 7.
Terms
- a(0) =1664a(1) =1232a(2) =602a(3) =530a(4) =594a(5) =790a(6) =1182a(7) =1670a(8) =2474a(9) =3890a(10) =5642a(11) =8594a(12) =13922a(13) =20498a(14) =31778a(15) =52418a(16) =77858a(17) =121922a(18) =203138a(19) =303170a(20) =477314a(21) =799490a(22) =1196162a(23) =1888514a(24) =3171842a(25) =4751618a(26) =7512578a(27) =12635138a(28) =18940418a(29) =29967362
External references
- oeis: A251888