Number of (n+1) X (8+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).
A235278
Number of (n+1) X (8+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) =15520a(1) =19060a(2) =23000a(3) =31504a(4) =41704a(5) =64168a(6) =93992a(7) =160888a(8) =260680a(9) =487960a(10) =867560a(11) =1744024a(12) =3354184a(13) =7125208a(14) =14577512a(15) =32303128a(16) =69232840a(17) =158470360a(18) =351398120a(19) =824485144a(20) =1873576264a(21) =4478463448a(22) =10354825832a(23) =25091436568a(24) =58718701000
External references
- oeis: A235278