Number of n X 2 0..2 arrays with every row and column running average nondecreasing rightwards and downwards.

A200528

Number of n X 2 0..2 arrays with every row and column running average nondecreasing rightwards and downwards.

Terms

    a(0) =6a(1) =20a(2) =57a(3) =146a(4) =354a(5) =825a(6) =1873a(7) =4169a(8) =9144a(9) =19825a(10) =42590a(11) =90815a(12) =192457a(13) =405760a(14) =851740a(15) =1781227a(16) =3713015a(17) =7718092a(18) =16003641a(19) =33111477a(20) =68374642a(21) =140947848a(22) =290098848a(23) =596244613a(24) =1223916576a(25) =2509450811a(26) =5139839214a(27) =10517282966

External references