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

A304665

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

Terms

    a(0) =5a(1) =21a(2) =30a(3) =93a(4) =249a(5) =544a(6) =1366a(7) =3399a(8) =8219a(9) =20292a(10) =49933a(11) =122347a(12) =301036a(13) =740028a(14) =1817181a(15) =4467409a(16) =10981074a(17) =26981337a(18) =66317395a(19) =163000592a(20) =400583332a(21) =984545201a(22) =2419821691a(23) =5947201372a(24) =14616786659a(25) =35924785775a(26) =88293925192

External references