Number of -4..4 arrays x(0..n-1) of n elements with zero sum and no element more than one greater than the previous.

A199843

Number of -4..4 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) =5a(2) =18a(3) =68a(4) =239a(5) =845a(6) =2958a(7) =10349a(8) =36111a(9) =126121a(10) =441161a(11) =1546353a(12) =5432430a(13) =19130949a(14) =67536934a(15) =238991556a(16) =847646318a(17) =3012890719a(18) =10730694626a(19) =38289978058a(20) =136865206035a(21) =489995352710

External references