Number of (n+2)X6 0..2 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order.

A185472

Number of (n+2)X6 0..2 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order.

Terms

    a(0) =34779a(1) =225672a(2) =1043186a(3) =3959167a(4) =12990375a(5) =37961900a(6) =100908633a(7) =247920339a(8) =570069808a(9) =1239033996a(10) =2565887950a(11) =5095678058a(12) =9756244258a(13) =18087995239a(14) =32592776835a(15) =57255685167a(16) =98315034745a(17) =165384433476a(18) =273069215898

External references