Nonnegative k such that 3*k + 1 is a perfect cube.

Terms

a(0) =0a(1) =21a(2) =114a(3) =333a(4) =732a(5) =1365a(6) =2286a(7) =3549a(8) =5208a(9) =7317a(10) =9930a(11) =13101a(12) =16884a(13) =21333a(14) =26502a(15) =32445a(16) =39216a(17) =46869a(18) =55458a(19) =65037a(20) =75660a(21) =87381a(22) =100254a(23) =114333a(24) =129672a(25) =146325a(26) =164346a(27) =183789a(28) =204708a(29) =227157