Number of -3..3 arrays x(0..n+1) of n+2 elements with zero sum and no two neighbors summing to zero.
A199827
Number of -3..3 arrays x(0..n+1) of n+2 elements with zero sum and no two neighbors summing to zero.
Terms
- a(0) =24a(1) =140a(2) =646a(3) =3556a(4) =20240a(5) =113884a(6) =645780a(7) =3685550a(8) =21117750a(9) =121503530a(10) =701432670a(11) =4060132070a(12) =23557575574a(13) =136975281374a(14) =797920002262
External references
- oeis: A199827