Number of nX3 0..1 arrays with every element unequal to 2, 3, 5 or 7 king-move adjacent elements, with upper left element zero.

A304258

Number of nX3 0..1 arrays with every element unequal to 2, 3, 5 or 7 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =0a(1) =4a(2) =8a(3) =13a(4) =17a(5) =26a(6) =61a(7) =120a(8) =233a(9) =515a(10) =959a(11) =2203a(12) =4422a(13) =9326a(14) =20164a(15) =40967a(16) =89272a(17) =185242a(18) =392175a(19) =835695a(20) =1743530a(21) =3727147a(22) =7826272a(23) =16565391a(24) =35110869a(25) =73906489a(26) =156874751a(27) =330846728a(28) =699916420a(29) =1480948392

External references