Number of (n+2)X(1+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.
A252416
Number of (n+2)X(1+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) =830a(1) =1006a(2) =1099a(3) =1536a(4) =2380a(5) =3719a(6) =5725a(7) =9410a(8) =15913a(9) =24959a(10) =41482a(11) =71673a(12) =113483a(13) =190458a(14) =331355a(15) =528273a(16) =890510a(17) =1550563a(18) =2484529a(19) =4198986a(20) =7302055a(21) =11748241a(22) =19885680a(23) =34513509a(24) =55726873a(25) =94410220a(26) =163496363a(27) =264847361a(28) =448910350
External references
- oeis: A252416