Number of (n+1) X (3+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).
A235273
Number of (n+1) X (3+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) =208a(1) =380a(2) =632a(3) =1280a(4) =2344a(5) =5096a(6) =10088a(7) =23000a(8) =48328a(9) =113720a(10) =249512a(11) =599480a(12) =1355464a(13) =3301496a(14) =7618088a(15) =18722360a(16) =43787848a(17) =108247160a(18) =255425192a(19) =633863480a(20) =1504419784a(21) =3742789496a(22) =8917090088a(23) =22221233720a(24) =53073853768a(25) =132403182200
External references
- oeis: A235273