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 5 (constant-stress 1 X 1 tilings).
A235274
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 5 (constant-stress 1 X 1 tilings).
Terms
- a(0) =520a(1) =844a(2) =1280a(3) =2344a(4) =3952a(5) =7936a(6) =14672a(7) =31504a(8) =62800a(9) =141424a(10) =298640a(11) =695344a(12) =1530832a(13) =3647536a(14) =8265872a(15) =20008624a(16) =46236880a(17) =113126704a(18) =264832400a(19) =652640944a(20) =1540956112a(21) =3815788336a(22) =9060105872a(23) =22507117744a(24) =53636823760a(25) =133528827184
External references
- oeis: A235274