Number of -n..n arrays x(0..4) of 5 elements with zero sum and no two or three adjacent elements summing to zero.

A200432

Number of -n..n arrays x(0..4) of 5 elements with zero sum and no two or three adjacent elements summing to zero.

Terms

    a(0) =0a(1) =80a(2) =520a(3) =1830a(4) =4750a(5) =10250a(6) =19530a(7) =34020a(8) =55380a(9) =85500a(10) =126500a(11) =180730a(12) =250770a(13) =339430a(14) =449750a(15) =585000a(16) =748680a(17) =944520a(18) =1176480a(19) =1448750a(20) =1765750a(21) =2132130a(22) =2552770a(23) =3032780a(24) =3577500a(25) =4192500a(26) =4883580a(27) =5656770a(28) =6518330a(29) =7474750

External references