Number of n X 1 0..5 arrays with values 0..5 introduced in row major order and each element equal to at least one horizontal or vertical neighbor.

A198620

Number of n X 1 0..5 arrays with values 0..5 introduced in row major order and each element equal to at least one horizontal or vertical neighbor.

Terms

    a(0) =0a(1) =1a(2) =1a(3) =2a(4) =3a(5) =6a(6) =11a(7) =23a(8) =47a(9) =103a(10) =226a(11) =518a(12) =1200a(13) =2866a(14) =6939a(15) =17184a(16) =43133a(17) =110122a(18) =284485a(19) =744297a(20) =1965907a(21) =5240825a(22) =14072796a(23) =38039586a(24) =103368602a(25) =282201932a(26) =773327639a(27) =2126010274a(28) =5860104847a(29) =16188449006

External references