Number of subsets of 8 integers between 1 and n such that their sum is 0 modulo n.

Terms

a(0) =1a(1) =5a(2) =15a(3) =43a(4) =99a(5) =217a(6) =429a(7) =809a(8) =1430a(9) =2438a(10) =3978a(11) =6310a(12) =9690a(13) =14550a(14) =21318a(15) =30666a(16) =43263a(17) =60115a(18) =82225a(19) =111041a(20) =148005a(21) =195143a(22) =254475a(23) =328755a(24) =420732a(25) =534076a(26) =672452a(27) =840652a(28) =1043460a(29) =1287036