Seventh partial sums of cubes (A000578).

Terms

a(0) =1a(1) =15a(2) =111a(3) =561a(4) =2211a(5) =7293a(6) =21021a(7) =54483a(8) =129558a(9) =286858a(10) =598026a(11) =1184118a(12) =2242266a(13) =4083366a(14) =7184166a(15) =12257850a(16) =20348031a(17) =32951985a(18) =52179985a(19) =80958735a(20) =123288165a(21) =184562235a(22) =271965915a(23) =394962165a(24) =565884540a(25) =800652996a(26) =1119632580a(27) =1548656956