First differences of cubes of triangular numbers.

Terms

a(0) =0a(1) =1a(2) =26a(3) =189a(4) =784a(5) =2375a(6) =5886a(7) =12691a(8) =24704a(9) =44469a(10) =75250a(11) =121121a(12) =187056a(13) =279019a(14) =404054a(15) =570375a(16) =787456a(17) =1066121a(18) =1418634a(19) =1858789a(20) =2402000a(21) =3065391a(22) =3867886a(23) =4830299a(24) =5975424a(25) =7328125a(26) =8915426a(27) =10766601a(28) =12913264a(29) =15389459