a(n) = n^6 + 5*n^5 + 19*n^4 + 44*n^3 + 72*n^2 + 69*n + 5.

Terms

a(0) =5a(1) =215a(2) =1311a(3) =5531a(4) =18329a(5) =50775a(6) =122675a(7) =266411a(8) =531501a(9) =989879a(10) =1741895a(11) =2923035a(12) =4711361a(13) =7335671a(14) =11084379a(15) =16315115a(16) =23465045a(17) =33061911a(18) =45735791a(19) =62231579a(20) =83422185a(21) =110322455a(22) =144103811a(23) =186109611a(24) =237871229a(25) =301124855a(26) =377829015a(27) =470182811