Number of (n+1) X (5+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).
A235275
Number of (n+1) X (5+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) =1120a(1) =1660a(2) =2344a(3) =3952a(4) =6232a(5) =11704a(6) =20440a(7) =41704a(8) =79480a(9) =172360a(10) =352024a(11) =797512a(12) =1714552a(13) =4006024a(14) =8930200a(15) =21319624a(16) =48718840a(17) =118055560a(18) =274305304a(19) =671516872a(20) =1577623672a(21) =3888983944a(22) =9203383960a(23) =22793395144a(24) =54200318200a(25) =134655258760
External references
- oeis: A235275