Number of nX3 0..1 arrays with every element unequal to 0, 1, 2, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

A316688

Number of nX3 0..1 arrays with every element unequal to 0, 1, 2, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =4a(1) =3a(2) =8a(3) =9a(4) =21a(5) =42a(6) =81a(7) =165a(8) =330a(9) =657a(10) =1317a(11) =2634a(12) =5265a(13) =10533a(14) =21066a(15) =42129a(16) =84261a(17) =168522a(18) =337041a(19) =674085a(20) =1348170a(21) =2696337a(22) =5392677a(23) =10785354a(24) =21570705a(25) =43141413a(26) =86282826a(27) =172565649a(28) =345131301a(29) =690262602

External references