Number of n X 3 0..1 arrays with every element unequal to 0, 1, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero.

A306124

Number of n X 3 0..1 arrays with every element unequal to 0, 1, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =3a(1) =7a(2) =9a(3) =19a(4) =39a(5) =73a(6) =147a(7) =319a(8) =681a(9) =1451a(10) =3127a(11) =6789a(12) =14887a(13) =32963a(14) =73569a(15) =165355a(16) =374119a(17) =851749a(18) =1949959a(19) =4486007a(20) =10364533a(21) =24034895a(22) =55913671a(23) =130430861a(24) =304967127a(25) =714466543a(26) =1676614357a(27) =3939963499a(28) =9269602859a(29) =21830156705

External references