Number of (n+2) X (7+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.
A252253
Number of (n+2) X (7+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) =847a(1) =437a(2) =366a(3) =384a(4) =414a(5) =453a(6) =501a(7) =579a(8) =681a(9) =807a(10) =1011a(11) =1278a(12) =1608a(13) =2142a(14) =2841a(15) =3705a(16) =5103a(17) =6933a(18) =9195a(19) =12855a(20) =17646a(21) =23568a(22) =33150a(23) =45693a(24) =61197a(25) =86283a(26) =119121a(27) =159711a(28) =225387a(29) =311358
External references
- oeis: A252253