Partial sums of A002025.

Terms

a(0) =220a(1) =1404a(2) =4024a(3) =9044a(4) =15276a(5) =26020a(6) =38305a(7) =55601a(8) =118621a(9) =185549a(10) =252644a(11) =322259a(12) =402009a(13) =502494a(14) =624759a(15) =747127a(16) =888791a(17) =1031101a(18) =1202957a(19) =1379229a(20) =1564597a(21) =1761321a(22) =2041861a(23) =2350481a(24) =2670031a(25) =3026439a(26) =3463895a(27) =3932923a(28) =4435979