Number of -7..7 arrays x(0..n-1) of n elements with zero sum, and adjacent elements not equal modulo three (with -1 modulo 3 = 2).
A199908
Number of -7..7 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) =10a(2) =114a(3) =680a(4) =6064a(5) =62776a(6) =518560a(7) =4854740a(8) =47329800a(9) =436295060a(10) =4163000530a(11) =40224691008a(12) =383919683336
External references
- oeis: A199908