a(n) = Sum_{k=1..prime(n)-1} floor(k^5/prime(n)).

Terms

a(0) =0a(1) =10a(2) =258a(3) =1740a(4) =20070a(5) =48510a(6) =196920a(7) =350370a(8) =937860a(9) =3075030a(10) =4322160a(11) =10641330a(12) =17925180a(13) =22825110a(14) =35827560a(15) =65816010a(16) =113180910a(17) =133937670a(18) =215070570a(19) =288148140a(20) =331474860a(21) =493573080a(22) =633015810a(23) =899599140a(24) =1387338960a(25) =1700082450a(26) =1876303260a(27) =2272556790a(28) =2494333710