Number of -n..n arrays x(0..4) of 5 elements with zero sum and no two neighbors summing to zero.

Terms

a(0) =4a(1) =114a(2) =646a(3) =2146a(4) =5390a(5) =11384a(6) =21364a(7) =36796a(8) =59376a(9) =91030a(10) =133914a(11) =190414a(12) =263146a(13) =354956a(14) =468920a(15) =608344a(16) =776764a(17) =977946a(18) =1215886a(19) =1494810a(20) =1819174a(21) =2193664a(22) =2623196a(23) =3112916a(24) =3668200a(25) =4294654a(26) =4998114a(27) =5784646a(28) =6660546a(29) =7632340