Number of nX4 0..1 arrays with every element unequal to 0, 1, 3, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

A317425

Number of nX4 0..1 arrays with every element unequal to 0, 1, 3, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =5a(1) =21a(2) =32a(3) =97a(4) =279a(5) =640a(6) =1666a(7) =4365a(8) =11025a(9) =28226a(10) =72631a(11) =185925a(12) =475800a(13) =1220158a(14) =3127409a(15) =8009375a(16) =20525682a(17) =52605367a(18) =134773129a(19) =345342596a(20) =884980100a(21) =2267571655a(22) =5810363761a(23) =14888942668a(24) =38151102909a(25) =97757875153a(26) =250497703668

External references