Number of (n+2)X(5+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 2 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 2 4 6 or 7.
A252430
Number of (n+2)X(5+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 2 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 2 4 6 or 7.
Terms
- a(0) =2710a(1) =3057a(2) =8430a(3) =26396a(4) =85563a(5) =284379a(6) =920196a(7) =3034712a(8) =10150190a(9) =32981888a(10) =109313690a(11) =367179617a(12) =1196198109a(13) =3973075534a(14) =13372395915a(15) =43629651855a(16) =145063217940a(17) =488756887882
External references
- oeis: A252430