Cubes k^3 such that k^3 + (k+1)^3 is semiprime.

Terms

a(0) =1a(1) =8a(2) =27a(3) =125a(4) =216a(5) =512a(6) =2744a(7) =3375a(8) =8000a(9) =9261a(10) =35937a(11) =68921a(12) =125000a(13) =157464a(14) =328509a(15) =421875a(16) =474552a(17) =704969a(18) =729000a(19) =970299a(20) =1157625a(21) =1367631a(22) =1685159a(23) =2248091a(24) =2628072a(25) =2803221a(26) =3581577a(27) =3723875a(28) =4741632a(29) =5177717