Number of -n..n arrays x(0..7) of 8 elements with zero sum and no two or three adjacent elements summing to zero.

A200435

Number of -n..n arrays x(0..7) of 8 elements with zero sum and no two or three adjacent elements summing to zero.

Terms

    a(0) =0a(1) =1928a(2) =50592a(3) =473034a(4) =2591502a(5) =10217182a(6) =32233938a(7) =86581308a(8) =205946004a(9) =445471164a(10) =892792604a(11) =1680711318a(12) =3002811474a(13) =5132333154a(14) =8444609086a(15) =13443374616a(16) =20791260168a(17) =31344775440a(18) =46194094584a(19) =66707951618a(20) =94583955318

External references