Number of (n+1) X (3+1) 0..3 arrays with every 2 X 2 subblock having the sum of the absolute values of all six edge and diagonal differences equal to 9.

A234135

Number of (n+1) X (3+1) 0..3 arrays with every 2 X 2 subblock having the sum of the absolute values of all six edge and diagonal differences equal to 9.

Terms

    a(0) =192a(1) =296a(2) =488a(3) =968a(4) =1992a(5) =4808a(6) =11336a(7) =30536a(8) =76872a(9) =218696a(10) =567368a(11) =1657928a(12) =4362312a(13) =12916808a(14) =34218056a(15) =101986376a(16) =271073352a(17) =810573896a(18) =2158002248a(19) =6463471688a(20) =17221877832a(21) =51623592008a(22) =137606856776a(23) =412652601416

External references