One fifth of product plus sum of five consecutive nonnegative numbers.

Terms

a(0) =2a(1) =27a(2) =148a(3) =509a(4) =1350a(5) =3031a(6) =6056a(7) =11097a(8) =19018a(9) =30899a(10) =48060a(11) =72085a(12) =104846a(13) =148527a(14) =205648a(15) =279089a(16) =372114a(17) =488395a(18) =632036a(19) =807597a(20) =1020118a(21) =1275143a(22) =1578744a(23) =1937545a(24) =2358746a(25) =2850147a(26) =3420172a(27) =4077893a(28) =4833054a(29) =5696095