Number of nX3 0..1 arrays with every element unequal to 0, 1, 3, 5 or 8 king-move adjacent elements, with upper left element zero.

A305342

Number of nX3 0..1 arrays with every element unequal to 0, 1, 3, 5 or 8 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =3a(1) =9a(2) =14a(3) =28a(4) =63a(5) =126a(6) =245a(7) =505a(8) =1037a(9) =2088a(10) =4230a(11) =8613a(12) =17472a(13) =35423a(14) =71929a(15) =146011a(16) =296248a(17) =601240a(18) =1220345a(19) =2476606a(20) =5026129a(21) =10200761a(22) =20702551a(23) =42015462a(24) =85270560a(25) =173057285a(26) =351219532a(27) =712800109a(28) =1446630113a(29) =2935938275

External references