Number of n X 4 0..1 arrays with every element unequal to 0, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

A317811

Number of n X 4 0..1 arrays with every element unequal to 0, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

Terms

    a(0) =1a(1) =3a(2) =4a(3) =7a(4) =34a(5) =56a(6) =77a(7) =228a(8) =551a(9) =1300a(10) =3171a(11) =6929a(12) =16038a(13) =38283a(14) =89884a(15) =210213a(16) =489040a(17) =1140562a(18) =2668604a(19) =6250857a(20) =14610077a(21) =34124180a(22) =79756933a(23) =186440331a(24) =435962650a(25) =1019155893a(26) =2382147016a(27) =5568392343a(28) =13017040048a(29) =30430709271

External references