Number of -n..n arrays x(0..3) of 4 elements with zero sum, and adjacent elements not equal modulo three (with -1 modulo 3 = 2).

A199911

Number of -n..n arrays x(0..3) of 4 elements with zero sum, and adjacent elements not equal modulo three (with -1 modulo 3 = 2).

Terms

    a(0) =8a(1) =24a(2) =72a(3) =152a(4) =256a(5) =448a(6) =680a(7) =952a(8) =1384a(9) =1848a(10) =2368a(11) =3136a(12) =3912a(13) =4760a(14) =5960a(15) =7128a(16) =8384a(17) =10112a(18) =11752a(19) =13496a(20) =15848a(21) =18040a(22) =20352a(23) =23424a(24) =26248a(25) =29208a(26) =33096a(27) =36632a(28) =40320a(29) =45120

External references