Number of nX3 0..1 arrays with every element unequal to 1, 2, 4, 5 or 6 king-move adjacent elements, with upper left element zero.

A304699

Number of nX3 0..1 arrays with every element unequal to 1, 2, 4, 5 or 6 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =1a(1) =11a(2) =8a(3) =21a(4) =46a(5) =103a(6) =201a(7) =512a(8) =1123a(9) =2536a(10) =6010a(11) =14033a(12) =32343a(13) =76620a(14) =180379a(15) =423657a(16) =1000938a(17) =2367196a(18) =5593222a(19) =13232605a(20) =31329142a(21) =74187004a(22) =175694455a(23) =416223934a(24) =986251748a(25) =2337014644a(26) =5538273336a(27) =13126126679a(28) =31110785899a(29) =73739138697

External references