login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Primitive self-power numbers (or SPN's): terms in A134698 which cannot be obtained by taking an earlier term M (say) of A134698 and prefixing, inserting or suffixing a digit of M.
2

%I #2 Mar 31 2012 13:48:30

%S 32564,256432,325648,643256,832564

%N Primitive self-power numbers (or SPN's): terms in A134698 which cannot be obtained by taking an earlier term M (say) of A134698 and prefixing, inserting or suffixing a digit of M.

%e 232564 is an SPN but is not primitive since it can be obtained from the SPN 32564 by prefixing the digit 2.

%Y Cf. A134698, A134947.

%K nonn,base,more

%O 1,1

%A _M. F. Hasler_, Feb 02 2008