Numbers k such that k + sopfr(k) is a cube.

Terms

a(0) =0a(1) =1a(2) =4a(3) =82a(4) =190a(5) =195a(6) =200a(7) =886a(8) =957a(9) =1241a(10) =2947a(11) =3274a(12) =3681a(13) =5662a(14) =8766a(15) =9123a(16) =10135a(17) =11143a(18) =13677a(19) =13727a(20) =17121a(21) =17370a(22) =19508a(23) =26695a(24) =29750a(25) =31269a(26) =34956a(27) =35793a(28) =39109a(29) =40477