Number of (3+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 3 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 3 4 6 or 7.
A252643
Number of (3+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 3 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 3 4 6 or 7.
Terms
- a(0) =1189a(1) =4226a(2) =12840a(3) =29463a(4) =110665a(5) =355574a(6) =840655a(7) =3260707a(8) =10744547a(9) =25508207a(10) =101193115a(11) =338681148a(12) =802629085a(13) =3232141280a(14) =10932868939a(15) =25796432709a(16) =105008159655a(17) =358017641465a(18) =839978667582
External references
- oeis: A252643