Number of nX3 0..1 arrays with every element unequal to 0, 1, 2, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero.

A317148

Number of nX3 0..1 arrays with every element unequal to 0, 1, 2, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =4a(1) =14a(2) =36a(3) =102a(4) =389a(5) =1251a(6) =4091a(7) =13931a(8) =46536a(9) =155280a(10) =521208a(11) =1746936a(12) =5849787a(13) =19606077a(14) =65709643a(15) =220178291a(16) =737853898a(17) =2472724886a(18) =8286395276a(19) =27769017024a(20) =93059002391a(21) =311855992599

External references