Number of (n+2) X (3+2) 0..3 arrays with every 3 X 3 subblock row and column sum not equal to 0 3 5 6 or 7 and every 3 X 3 diagonal and antidiagonal sum equal to 0 3 5 6 or 7.
A252249
Number of (n+2) X (3+2) 0..3 arrays with every 3 X 3 subblock row and column sum not equal to 0 3 5 6 or 7 and every 3 X 3 diagonal and antidiagonal sum equal to 0 3 5 6 or 7.
Terms
- a(0) =278a(1) =242a(2) =231a(3) =249a(4) =279a(5) =318a(6) =366a(7) =444a(8) =546a(9) =672a(10) =876a(11) =1143a(12) =1473a(13) =2007a(14) =2706a(15) =3570a(16) =4968a(17) =6798a(18) =9060a(19) =12720a(20) =17511a(21) =23433a(22) =33015a(23) =45558a(24) =61062a(25) =86148a(26) =118986a(27) =159576a(28) =225252a(29) =311223
External references
- oeis: A252249