Number of (n+1) X (2+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).
A235272
Number of (n+1) X (2+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) =100a(1) =208a(2) =380a(3) =844a(4) =1660a(5) =3844a(6) =8012a(7) =19060a(8) =41500a(9) =100468a(10) =225740a(11) =552724a(12) =1269340a(13) =3130804a(14) =7297292a(15) =18083860a(16) =42569500a(17) =105816628a(18) =250733900a(19) =624493204a(20) =1486176220a(21) =3706326964a(22) =8845631372a(23) =22078365460a(24) =52792467100a(25) =131840507188
External references
- oeis: A235272