Number of -n..n arrays x(0..8) of 9 elements with zero sum and no two or three adjacent elements summing to zero.
A200436
Number of -n..n arrays x(0..8) of 9 elements with zero sum and no two or three adjacent elements summing to zero.
Terms
- a(0) =0a(1) =6780a(2) =270848a(3) =3397130a(4) =23380862a(5) =111101654a(6) =410475622a(7) =1264140498a(8) =3392223642a(9) =8172417894a(10) =18054265218a(11) =37145223104a(12) =72010763708a(13) =132735430724a(14) =234296453996a(15) =398306196892a(16) =655184386476
External references
- oeis: A200436