Number of (n+1) X (5+1) 0..3 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 4 (constant-stress 1 X 1 tilings).
A235286
Number of (n+1) X (5+1) 0..3 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 4 (constant-stress 1 X 1 tilings).
Terms
- a(0) =236a(1) =304a(2) =380a(3) =544a(4) =740a(5) =1168a(6) =1724a(7) =2944a(8) =4676a(9) =8464a(10) =14300a(11) =26944a(12) =47780a(13) =92368a(14) =169724a(15) =333184a(16) =627716a(17) =1243024a(18) =2382620a(19) =4740544a(20) =9195620a(21) =18341968a(22) =35876924a(23) =71655424a(24) =140988356a(25) =281779984a(26) =556789340a(27) =1113185344a(28) =2206452260a(29) =4412117968
External references
- oeis: A235286