Number of -6..6 arrays x(0..n-1) of n elements with zero sum, and adjacent elements not equal modulo three (with -1 modulo 3 = 2).

A199907

Number of -6..6 arrays x(0..n-1) of n elements with zero sum, and adjacent elements not equal modulo three (with -1 modulo 3 = 2).

Terms

    a(0) =1a(1) =8a(2) =84a(3) =448a(4) =3196a(5) =29864a(6) =216530a(7) =1699268a(8) =14546928a(9) =116482068a(10) =950119628a(11) =7969545520a(12) =65812921362a(13) =546169532636

External references