Number of nondecreasing arrangements of 5 nonzero numbers in -(n+3)..(n+3) with sum zero.

Terms

a(0) =40a(1) =86a(2) =166a(3) =288a(4) =472a(5) =726a(6) =1076a(7) =1534a(8) =2130a(9) =2878a(10) =3814a(11) =4954a(12) =6340a(13) =7990a(14) =9950a(15) =12242a(16) =14918a(17) =18000a(18) =21546a(19) =25582a(20) =30170a(21) =35338a(22) =41154a(23) =47648a(24) =54894a(25) =62924a(26) =71816a(27) =81606a(28) =92378a(29) =104168