Number of 8-member subsets of [8*n] whose elements sum to a multiple of n.

Terms

a(0) =0a(1) =1a(2) =6470a(3) =245157a(4) =2630044a(5) =15380937a(6) =62893270a(7) =202927725a(8) =553275192a(9) =1329890705a(10) =2898762854a(11) =5843355957a(12) =11050100956a(13) =19813501785a(14) =33963673590a(15) =56017460733a(16) =89356455544a(17) =138432467745a(18) =209004466054a(19) =308406729925a(20) =445853163548a(21) =632776453353a(22) =883208213270