A226232 Nontrivial prime powers (A025475) which are a sum of a smaller nontrivial prime power and a perfect cube.

9, 16, 128, 243, 512, 841, 1024, 1849, 5041, 6561, 8192, 32041, 65536, 76729, 157609, 177147, 187489, 310249, 524288, 734449, 1104601, 4108729, 4194304, 4782969, 5067001, 7778521, 11498881, 12823561, 31956409, 33554432, 38651089, 65302561, 78552769, 90459121, 129140163

Offset

1,1

Links

Table of n, a(n) for n=1..35.

Maple

for n from 1 do
    if isA025475(n) then
        for j from 1 do
            pj := n-j^3 ;
            if pj < 0 then
                break;
            elif isA025475(pj) then
                printf("%d, \n", n);
                break ;
            end if;
        end do:
    end if:
end do: # R. J. Mathar, Jun 06 2013

Crossrefs

Cf. A025475, A226230, A226231.

Sequence in context: A014720 A138238 A177171 * A267088 A204268 A075373

Adjacent sequences: A226229 A226230 A226231 * A226233 A226234 A226235

Keyword

nonn

Author

Alex Ratushnyak, May 31 2013

Status

approved