|
|
A112721
|
|
Numbers n such that phi(n)=d_1^1+d_2^2+...+d_k^k where d_1 d_2 ... d_k is the decimal expansion of n.
|
|
1
|
|
|
1, 44, 84, 5676, 32186, 35097, 128476, 527048, 700298, 12141094, 43874279, 58730238, 303387848, 2277279428
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,2
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
phi(12141094)=1^1+2^2+1^3+4^4+1^5+0^6+9^7+4^8 so 12141094 is in
the sequence.
|
|
MATHEMATICA
|
Do[d=IntegerDigits[n]; k=Length[d]; If[EulerPhi[n]==Sum[d[[j]]^j, {j, k}], Print[n]], {n, 30000000}]
|
|
CROSSREFS
|
|
|
KEYWORD
|
base,fini,more,nonn
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|