Number of nX6 0..1 arrays with every element equal to 1, 2 or 3 king-move adjacent elements, with upper left element zero.

A297821

Number of nX6 0..1 arrays with every element equal to 1, 2 or 3 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =5a(1) =573a(2) =1114a(3) =4306a(4) =14237a(5) =46701a(6) =146530a(7) =456814a(8) =1433279a(9) =4501076a(10) =14136685a(11) =44497190a(12) =140143464a(13) =441400791a(14) =1390241695a(15) =4379846806a(16) =13801547551a(17) =43497337265a(18) =137100786459a(19) =432178740943

External references