Number of n X 4 0..1 arrays with every element unequal to 0, 2, 3 or 5 king-move adjacent elements, with upper left element zero.

A304006

Number of n X 4 0..1 arrays with every element unequal to 0, 2, 3 or 5 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =1a(1) =13a(2) =21a(3) =26a(4) =64a(5) =115a(6) =211a(7) =439a(8) =870a(9) =1725a(10) =3513a(11) =7141a(12) =14372a(13) =29438a(14) =60518a(15) =123439a(16) =253860a(17) =523477a(18) =1075787a(19) =2216143a(20) =4575316a(21) =9438222a(22) =19480290a(23) =40253428a(24) =83178619a(25) =171897255a(26) =355448881a(27) =735100437a(28) =1520380599a(29) =3145360038

External references