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

A252150

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

Terms

    a(0) =1254a(1) =1945a(2) =2591a(3) =3583a(4) =5577a(5) =8309a(6) =13146a(7) =20950a(8) =33818a(9) =55346a(10) =92228a(11) =153326a(12) =257118a(13) =433125a(14) =730767a(15) =1232945a(16) =2092819a(17) =3539142a(18) =6005972a(19) =10197512a(20) =17313553a(21) =29382207a(22) =50001920a(23) =84896675a(24) =144348067a(25) =245505177a(26) =417484458a(27) =709656574

External references