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

A304004

Number of n X 2 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) =4a(2) =7a(3) =13a(4) =26a(5) =49a(6) =99a(7) =194a(8) =387a(9) =773a(10) =1538a(11) =3081a(12) =6147a(13) =12298a(14) =24587a(15) =49157a(16) =98330a(17) =196609a(18) =393251a(19) =786450a(20) =1572883a(21) =3145797a(22) =6291442a(23) =12583033a(24) =25165827a(25) =50331738a(26) =100663451a(27) =201326533a(28) =402653578a(29) =805306225

External references