Number of (5+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 2 5 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 2 5 6 or 7.
A252684
Number of (5+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 2 5 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 2 5 6 or 7.
Terms
- a(0) =1648a(1) =3573a(2) =11543a(3) =22203a(4) =96174a(5) =362380a(6) =722737a(7) =3155586a(8) =12207169a(9) =24482830a(10) =107405829a(11) =421462466a(12) =847387214a(13) =3725620904a(14) =14777364822a(15) =29772875790a(16) =131130161526a(17) =524782387151
External references
- oeis: A252684