Nested floor product of n and fractions (k+1)/k for all k>0 (mod 5), divided by 5.

Terms

a(0) =1a(1) =6a(2) =19a(3) =48a(4) =109a(5) =234a(6) =355a(7) =552a(8) =1009a(9) =1518a(10) =2371a(11) =3804a(12) =4141a(13) =6342a(14) =8803a(15) =12096a(16) =14389a(17) =18438a(18) =24043a(19) =27720a(20) =36397a(21) =45366a(22) =60499a(23) =75876a(24) =80137a(25) =97566a(26) =114931a(27) =140892a(28) =166321a(29) =205926