Number of nX4 0..1 arrays with every element unequal to 0, 2, 3, 5, 6 or 7 king-move adjacent elements, with upper left element zero.

A316119

Number of nX4 0..1 arrays with every element unequal to 0, 2, 3, 5, 6 or 7 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =1a(1) =13a(2) =23a(3) =56a(4) =213a(5) =702a(6) =2524a(7) =9034a(8) =33185a(9) =120129a(10) =440997a(11) =1617873a(12) =5923243a(13) =21727149a(14) =79684290a(15) =292246407a(16) =1071890143a(17) =3931760361a(18) =14421679034a(19) =52899023769a(20) =194038043140a(21) =711745909568

External references