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A226232
Nontrivial prime powers (A025475) which are a sum of a smaller nontrivial prime power and a perfect cube.
2
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
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
KEYWORD
nonn
AUTHOR
Alex Ratushnyak, May 31 2013
STATUS
approved