Sixth partial sums of cubes (A000578).

Terms

a(0) =1a(1) =14a(2) =96a(3) =450a(4) =1650a(5) =5082a(6) =13728a(7) =33462a(8) =75075a(9) =157300a(10) =311168a(11) =586092a(12) =1058148a(13) =1841100a(14) =3100800a(15) =5073684a(16) =8090181a(17) =12603954a(18) =19228000a(19) =28778750a(20) =42329430a(21) =61274070a(22) =87403680a(23) =122996250a(24) =170922375a(25) =234768456a(26) =318979584a(27) =429024376a(28) =571584200a(29) =754769400