Number of zero-sum -n..n arrays of 7 elements with first through fourth differences also in -n..n.

A201442

Number of zero-sum -n..n arrays of 7 elements with first through fourth differences also in -n..n.

Terms

    a(0) =5a(1) =39a(2) =295a(3) =1275a(4) =4285a(5) =11591a(6) =27087a(7) =57287a(8) =111197a(9) =203089a(10) =349901a(11) =576085a(12) =913583a(13) =1401163a(14) =2091765a(15) =3041933a(16) =4328151a(17) =6039055a(18) =8278625a(19) =11178429a(20) =14870953a(21) =19532181a(22) =25349001a(23) =32546367a(24) =41378489a(25) =52112595a(26) =65077017a(27) =80620049a(28) =99147253

External references