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

A304770

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

Terms

    a(0) =4a(1) =21a(2) =27a(3) =67a(4) =139a(5) =303a(6) =685a(7) =1511a(8) =3316a(9) =7349a(10) =16265a(11) =35899a(12) =79332a(13) =175408a(14) =387618a(15) =856555a(16) =1893162a(17) =4184055a(18) =9246710a(19) =20435743a(20) =45164387a(21) =99815208a(22) =220596189a(23) =487529334a(24) =1077464178a(25) =2381248108a(26) =5262677458a(27) =11630780579a(28) =25704601383

External references