Number of nX3 0..1 arrays with every element unequal to 0, 1, 3, 6 or 8 king-move adjacent elements, with upper left element zero.

A305477

Number of nX3 0..1 arrays with every element unequal to 0, 1, 3, 6 or 8 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =3a(1) =7a(2) =10a(3) =21a(4) =40a(5) =70a(6) =125a(7) =231a(8) =419a(9) =752a(10) =1365a(11) =2482a(12) =4488a(13) =8121a(14) =14729a(15) =26689a(16) =48322a(17) =87545a(18) =158636a(19) =287360a(20) =520537a(21) =943067a(22) =1708503a(23) =3095024a(24) =5606953a(25) =10157742a(26) =18401740a(27) =33336465a(28) =60392685a(29) =109407857

External references