Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 3 5 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 0 3 5 6 or 7.

A252247

Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 3 5 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 0 3 5 6 or 7.

Terms

    a(0) =318a(1) =260a(2) =278a(3) =352a(4) =463a(5) =616a(6) =847a(7) =1160a(8) =1625a(9) =2281a(10) =3237a(11) =4631a(12) =6575a(13) =9496a(14) =13664a(15) =19579a(16) =28429a(17) =41049a(18) =59172a(19) =86036a(20) =124646a(21) =180255a(22) =262364a(23) =381099a(24) =552201a(25) =804746a(26) =1170960a(27) =1699487a(28) =2479568a(29) =3612216

External references