Number of (n+2)X(4+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 2 5 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 0 2 5 6 or 7.
A252419
Number of (n+2)X(4+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 2 5 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 0 2 5 6 or 7.
Terms
- a(0) =1536a(1) =1704a(2) =3796a(3) =6834a(4) =22038a(5) =62288a(6) =113324a(7) =380113a(8) =1090041a(9) =1973072a(10) =6662465a(11) =19166898a(12) =34694777a(13) =117327314a(14) =337764647a(15) =611422010a(16) =2068344465a(17) =5955308893a(18) =10780434860a(19) =36471334123a(20) =105014194820a(21) =190099680839a(22) =643138365330
External references
- oeis: A252419