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

A303964

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

Terms

    a(0) =3a(1) =9a(2) =13a(3) =26a(4) =54a(5) =101a(6) =186a(7) =361a(8) =700a(9) =1340a(10) =2562a(11) =4913a(12) =9427a(13) =18084a(14) =34674a(15) =66476a(16) =127478a(17) =244485a(18) =468836a(19) =899014a(20) =1723966a(21) =3305986a(22) =6339698a(23) =12157161a(24) =23312919a(25) =44705673a(26) =85729179a(27) =164397103a(28) =315253197a(29) =604539962

External references