Number of (n+1) X (4+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 1, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).
A234878
Number of (n+1) X (4+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 1, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).
Terms
- a(0) =268a(1) =628a(2) =1116a(3) =3336a(4) =6364a(5) =22748a(6) =44540a(7) =178572a(8) =353428a(9) =1512256a(10) =3007252a(11) =13311628a(12) =26527148a(13) =119439828a(14) =238241724a(15) =1081829832a(16) =2158800908a(17) =9844644828a(18) =19648912012a(19) =89797542908a(20) =179243095124a(21) =820073869984
External references
- oeis: A234878