Number of (n+1) X (2+1) 0..2 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 2 (constant-stress 1 X 1 tilings).
A234260
Number of (n+1) X (2+1) 0..2 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 2 (constant-stress 1 X 1 tilings).
Terms
- a(0) =46a(1) =88a(2) =170a(3) =358a(4) =754a(5) =1690a(6) =3746a(7) =8722a(8) =19906a(9) =47458a(10) =110210a(11) =266818a(12) =626434a(13) =1532290a(14) =3623426a(15) =8925442a(16) =21208066a(17) =52491778a(18) =125134850a(19) =310731778a(20) =742387714a(21) =1847564290a(22) =4420706306a(23) =11018178562a(24) =26389889026a(25) =65840439298a(26) =157802201090
External references
- oeis: A234260