Number of -4..4 arrays x(0..n+2) of n+3 elements with zero sum and no two or three adjacent elements summing to zero.
A200426
Number of -4..4 arrays x(0..n+2) of n+3 elements with zero sum and no two or three adjacent elements summing to zero.
Terms
- a(0) =248a(1) =1830a(2) =11008a(3) =67852a(4) =473034a(5) =3397130a(6) =24220966a(7) =171351382a(8) =1214558880a(9) =8651325238a(10) =61876262346a(11) =443696753874
External references
- oeis: A200426