Number of (n+2)X(5+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.

A252012

Number of (n+2)X(5+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) =1970a(1) =3128a(2) =4770a(3) =8482a(4) =23074a(5) =58970a(6) =104034a(7) =288370a(8) =744818a(9) =1308322a(10) =3648082a(11) =9501482a(12) =16654562a(13) =46626322a(14) =122075402a(15) =213680482a(16) =599752402a(17) =1575429482a(18) =2755215842a(19) =7745663122a(20) =20388177482a(21) =35636762722a(22) =100284675922a(23) =264307061162

External references