Number of -5..5 arrays x(0..n-1) of n elements with zero sum, and adjacent elements not equal modulo three (with -1 modulo 3 = 2).

A199906

Number of -5..5 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) =60a(3) =256a(4) =1836a(5) =12872a(6) =77874a(7) =547604a(8) =3784512a(9) =25525476a(10) =179010266a(11) =1249682864a(12) =8709865930a(13) =61360521500a(14) =432263649142

External references