Number of strictly increasing arrangements of 6 numbers in -(n+4)..(n+4) with sum zero.

Terms

a(0) =32a(1) =94a(2) =227a(3) =480a(4) =920a(5) =1636a(6) =2739a(7) =4370a(8) =6698a(9) =9926a(10) =14293a(11) =20076a(12) =27594a(13) =37212a(14) =49341a(15) =64444a(16) =83036a(17) =105690a(18) =133037a(19) =165772a(20) =204654a(21) =250510a(22) =304239a(23) =366814a(24) =439284a(25) =522780a(26) =618513a(27) =727782a(28) =851974a(29) =992568