Number of (n+2) X (1+2) 0..3 arrays with every 3 X 3 subblock row, column, diagonal and antidiagonal sum not equal to 1 3 4 6 or 7.
A252362
Number of (n+2) X (1+2) 0..3 arrays with every 3 X 3 subblock row, column, diagonal and antidiagonal sum not equal to 1 3 4 6 or 7.
Terms
- a(0) =130a(1) =152a(2) =282a(3) =658a(4) =1482a(5) =3188a(6) =6954a(7) =15432a(8) =34120a(9) =74978a(10) =164806a(11) =363086a(12) =800136a(13) =1761810a(14) =3878444a(15) =8540376a(16) =18808306a(17) =41417594a(18) =91200010a(19) =200823828a(20) =442228226a(21) =973812608a(22) =2144371120a(23) =4721986338a(24) =10398032398a(25) =22896956750a(26) =50420107128
External references
- oeis: A252362