a(n) = 60*(n^5/120 + n^4/24 + n^3/6 + n^2/2 + n + 1).

Terms

a(0) =163a(1) =436a(2) =1104a(3) =2572a(4) =5485a(5) =10788a(6) =19786a(7) =34204a(8) =56247a(9) =88660a(10) =134788a(11) =198636a(12) =284929a(13) =399172a(14) =547710a(15) =737788a(16) =977611a(17) =1276404a(18) =1644472a(19) =2093260a(20) =2635413a(21) =3284836a(22) =4056754a(23) =4967772a(24) =6035935a(25) =7280788a(26) =8723436a(27) =10386604a(28) =12294697a(29) =14473860