Number of nX3 0..1 arrays with every element equal to 1, 3, 4, 5 or 8 king-move adjacent elements, with upper left element zero.

A298829

Number of nX3 0..1 arrays with every element equal to 1, 3, 4, 5 or 8 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =0a(1) =4a(2) =1a(3) =6a(4) =10a(5) =15a(6) =60a(7) =128a(8) =267a(9) =810a(10) =1878a(11) =4579a(12) =12408a(13) =30552a(14) =77105a(15) =200876a(16) =505862a(17) =1288511a(18) =3311514a(19) =8411436a(20) =21467751a(21) =54921524a(22) =139947224a(23) =357287611a(24) =912689144a(25) =2328342518a(26) =5944207749a(27) =15177139978a(28) =38734201690a(29) =98882999903

External references