Sum of next n cubes.

Terms

a(0) =0a(1) =1a(2) =35a(3) =405a(4) =2584a(5) =11375a(6) =38961a(7) =111475a(8) =278720a(9) =627669a(10) =1300375a(11) =2516921a(12) =4604040a(13) =8030035a(14) =13446629a(15) =21738375a(16) =34080256a(17) =52004105a(18) =77474475a(19) =112974589a(20) =161603000a(21) =227181591a(22) =314375545a(23) =428825915a(24) =577295424a(25) =767828125a(26) =1009923551a(27) =1314725985a(28) =1695229480a(29) =2166499259