Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 0,1,1,0,0 for x=0,1,2,3,4.
A197313
Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 0,1,1,0,0 for x=0,1,2,3,4.
Terms
- a(0) =1a(1) =2a(2) =10a(3) =160a(4) =152a(5) =790a(6) =2724a(7) =6242a(8) =26422a(9) =91756a(10) =281296a(11) =990140a(12) =3437208a(13) =11190922a(14) =37836768a(15) =129296206a(16) =433975472a(17) =1455029298a(18) =4951850734a(19) =16696765546a(20) =56134653324a(21) =190052231444a(22) =641906625424
External references
- oeis: A197313