Number of nX3 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,0,1,1,1 for x=0,1,2,3,4.
A197426
Number of nX3 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,0,1,1,1 for x=0,1,2,3,4.
Terms
- a(0) =4a(1) =20a(2) =68a(3) =448a(4) =2152a(5) =10684a(6) =55567a(7) =280544a(8) =1425111a(9) =7280350a(10) =37165198a(11) =189316196a(12) =965915209a(13) =4926863205a(14) =25123365839a(15) =128156345456a(16) =653685106884
External references
- oeis: A197426