Number of (7+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 1 3 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 1 3 6 or 7.
A252312
Number of (7+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 1 3 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 1 3 6 or 7.
Terms
- a(0) =5496a(1) =4905a(2) =7492a(3) =10626a(4) =20910a(5) =33862a(6) =48579a(7) =104334a(8) =172130a(9) =244167a(10) =588270a(11) =986138a(12) =1389063a(13) =3730350a(14) =6337034a(15) =8869479a(16) =25958190a(17) =44510186a(18) =62011047a(19) =192163374a(20) =331380650a(21) =460363047a(22) =1475370030a(23) =2552327978a(24) =3540109863
External references
- oeis: A252312