Cubes of triangular numbers: (n*(n+1)/2)^3.

Terms

a(0) =1a(1) =27a(2) =216a(3) =1000a(4) =3375a(5) =9261a(6) =21952a(7) =46656a(8) =91125a(9) =166375a(10) =287496a(11) =474552a(12) =753571a(13) =1157625a(14) =1728000a(15) =2515456a(16) =3581577a(17) =5000211a(18) =6859000a(19) =9261000a(20) =12326391a(21) =16194277a(22) =21024576a(23) =27000000a(24) =34328125a(25) =43243551a(26) =54010152a(27) =66923416a(28) =82312875a(29) =100544625