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

A252107

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

Terms

    a(0) =1417a(1) =1929a(2) =1568a(3) =1600a(4) =1884a(5) =2058a(6) =2468a(7) =3149a(8) =3950a(9) =5208a(10) =6792a(11) =8716a(12) =11582a(13) =15298a(14) =19912a(15) =26490a(16) =35242a(17) =46364a(18) =61862a(19) =82494a(20) =108984a(21) =145626a(22) =194574a(23) =257870a(24) =344814a(25) =461252a(26) =612860a(27) =819926a(28) =1097602a(29) =1461226

External references