Number of nX4 0..1 arrays with every element unequal to 1, 2, 5 or 8 king-move adjacent elements, with upper left element zero.

A304298

Number of nX4 0..1 arrays with every element unequal to 1, 2, 5 or 8 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =2a(1) =1a(2) =5a(3) =4a(4) =13a(5) =30a(6) =43a(7) =129a(8) =245a(9) =519a(10) =1254a(11) =2525a(12) =5707a(13) =12749a(14) =27205a(15) =60962a(16) =133639a(17) =292125a(18) =647249a(19) =1418245a(20) =3119874a(21) =6875729a(22) =15098235a(23) =33237465a(24) =73128441a(25) =160782286a(26) =353832779a(27) =778266279a(28) =1711882901a(29) =3766329669

External references