Number of n-element subsets of [3n] whose elements sum to a multiple of n.

A318431

Number of n-element subsets of [3n] whose elements sum to a multiple of n.

Terms

    a(0) =1a(1) =3a(2) =6a(3) =30a(4) =126a(5) =603a(6) =3084a(7) =16614a(8) =91998a(9) =520779a(10) =3004206a(11) =17594250a(12) =104308092a(13) =624801960a(14) =3775722348a(15) =22991162130a(16) =140928103134a(17) =868886416869

External references