T(n,k)=Number of -k..k arrays x(0..n+2) of n+3 elements with zero sum and no two or three adjacent elements summing to zero.

A200430

T(n,k)=Number of -k..k arrays x(0..n+2) of n+3 elements with zero sum and no two or three adjacent elements summing to zero.

Terms

    a(0) =0a(1) =20a(2) =0a(3) =92a(4) =80a(5) =0a(6) =248a(7) =520a(8) =212a(9) =0a(10) =520a(11) =1830a(12) =2232a(13) =594a(14) =0a(15) =940a(16) =4750a(17) =11008a(18) =9898a(19) =1928a(20) =0a(21) =1540a(22) =10250a(23) =36952a(24) =67852a(25) =50592a(26) =6780a(27) =0a(28) =2352a(29) =19530

External references