Number of 7-member subsets of [7*n] whose elements sum to a multiple of n.

Terms

a(0) =0a(1) =1a(2) =1716a(3) =38760a(4) =296010a(5) =1344904a(6) =4496388a(7) =12271518a(8) =28989675a(9) =61474519a(10) =119877472a(11) =218618940a(12) =377447148a(13) =622614630a(14) =988172374a(15) =1517381580a(16) =2264243157a(17) =3295144749a(18) =4690625500a(19) =6547258432a(20) =8979650478a(21) =12122560170a(22) =16133132940a(23) =21193254160a(24) =27512019711