Number of nX3 0..1 arrays with every element unequal to 0, 1, 2, 3, 7 or 8 king-move adjacent elements, with upper left element zero.

A316513

Number of nX3 0..1 arrays with every element unequal to 0, 1, 2, 3, 7 or 8 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =4a(1) =21a(2) =28a(3) =75a(4) =174a(5) =414a(6) =1002a(7) =2398a(8) =5743a(9) =13785a(10) =33053a(11) =79248a(12) =190054a(13) =455751a(14) =1092871a(15) =2620730a(16) =6284531a(17) =15070301a(18) =36138673a(19) =86660727a(20) =207812777a(21) =498336020a(22) =1195012127a(23) =2865644552a(24) =6871828916a(25) =16478677644a(26) =39515945239a(27) =94759419700

External references