Number of nX3 0..1 arrays with every element unequal to 1, 2, 4, 6 or 7 king-move adjacent elements, with upper left element zero.

A305092

Number of nX3 0..1 arrays with every element unequal to 1, 2, 4, 6 or 7 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =1a(1) =9a(2) =14a(3) =17a(4) =64a(5) =158a(6) =229a(7) =630a(8) =1626a(9) =2950a(10) =6627a(11) =16872a(12) =34743a(13) =73749a(14) =177939a(15) =391569a(16) =832239a(17) =1918128a(18) =4326797a(19) =9358621a(20) =21010056a(21) =47538986a(22) =104476103a(23) =232064401a(24) =522612729a(25) =1159790910a(26) =2570796250a(27) =5758552148a(28) =12835315322a(29) =28485986767

External references