Number of nX3 0..1 arrays with every element unequal to 0, 1, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero.

A305913

Number of nX3 0..1 arrays with every element unequal to 0, 1, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =3a(1) =9a(2) =13a(3) =27a(4) =62a(5) =135a(6) =312a(7) =825a(8) =2367a(9) =6940a(10) =21330a(11) =67814a(12) =216690a(13) =699884a(14) =2279373a(15) =7427118a(16) =24244543a(17) =79292187a(18) =259332414a(19) =848386032a(20) =2776599349a(21) =9087224618a(22) =29741257114a(23) =97348224464a(24) =318637326698

External references