Number of strictly increasing arrangements of 7 nonzero numbers in -(n+5)..(n+5) with sum zero.

Terms

a(0) =42a(1) =152a(2) =426a(3) =1032a(4) =2216a(5) =4376a(6) =8044a(7) =13994a(8) =23210a(9) =37030a(10) =57086a(11) =85506a(12) =124816a(13) =178186a(14) =249308a(15) =342708a(16) =463550a(17) =618042a(18) =813186a(19) =1057238a(20) =1359422a(21) =1730468a(22) =2182232a(23) =2728362a(24) =3383832a(25) =4165678a(26) =5092482a(27) =6185216a(28) =7466594a(29) =8962070