Number of zero-sum -n..n arrays of 7 elements with adjacent element differences also in -n..n.

A202257

Number of zero-sum -n..n arrays of 7 elements with adjacent element differences also in -n..n.

Terms

    a(0) =75a(1) =1415a(2) =10239a(3) =45523a(4) =150523a(5) =408211a(6) =960501a(7) =2031401a(8) =3953913a(9) =7200915a(10) =12419753a(11) =20470827a(12) =32469879a(13) =49834303a(14) =74333103a(15) =108140939a(16) =153895771a(17) =214760605a(18) =294488845a(19) =397493755a(20) =528921481a(21) =694728253a(22) =901761087a(23) =1157842693a(24) =1471859885a(25) =1853856197a(26) =2315127971

External references