Number of (n+1) X 3 binary arrays with every 2 X 2 subblock commuting with each of its horizontal and vertical 2 X 2 subblock neighbors.

A186455

Number of (n+1) X 3 binary arrays with every 2 X 2 subblock commuting with each of its horizontal and vertical 2 X 2 subblock neighbors.

Terms

    a(0) =21a(1) =30a(2) =51a(3) =88a(4) =128a(5) =197a(6) =292a(7) =457a(8) =688a(9) =1058a(10) =1589a(11) =2424a(12) =3651a(13) =5552a(14) =8376a(15) =12709a(16) =19192a(17) =29085a(18) =43952a(19) =66562a(20) =100629a(21) =152332a(22) =230359a(23) =348632a(24) =527296a(25) =797909a(26) =1206940a(27) =1826193a(28) =2762528a(29) =4179698

External references