Number of nX3 0..1 arrays with every element unequal to 2, 3, 4 or 6 king-move adjacent elements, with upper left element zero.

A304151

Number of nX3 0..1 arrays with every element unequal to 2, 3, 4 or 6 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =0a(1) =5a(2) =4a(3) =42a(4) =130a(5) =464a(6) =1722a(7) =6378a(8) =22939a(9) =84079a(10) =306987a(11) =1119981a(12) =4087469a(13) =14922974a(14) =54464744a(15) =198801521a(16) =725648052a(17) =2648666277a(18) =9667805493a(19) =35288299004a(20) =128804934449a(21) =470147769118

External references