Number of -7..7 arrays x(0..n-1) of n elements with zero sum and no element more than one greater than the previous.

A199846

Number of -7..7 arrays x(0..n-1) of n elements with zero sum and no element more than one greater than the previous.

Terms

    a(0) =1a(1) =8a(2) =41a(3) =206a(4) =944a(5) =4188a(6) =17879a(7) =74424a(8) =303400a(9) =1218440a(10) =4833416a(11) =18992142a(12) =74057460a(13) =287035502a(14) =1107086841a(15) =4253339267a(16) =16289667330a(17) =62230152461a(18) =237255014892a(19) =903101912666

External references