Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 0 3 4 6 or 7.

A252098

Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 0 3 4 6 or 7.

Terms

    a(0) =2458a(1) =4581a(2) =6549a(3) =10605a(4) =21457a(5) =38599a(6) =70372a(7) =150102a(8) =279508a(9) =526503a(10) =1137691a(11) =2133409a(12) =4041470a(13) =8722390a(14) =16378835a(15) =31115832a(16) =67038148a(17) =126047760a(18) =240095403a(19) =516489711a(20) =972298255a(21) =1856211222a(22) =3987809116a(23) =7515714093a(24) =14376285670

External references