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A113707
Numbers k such that the base-10 representation of sigma(k) is a cyclic permutation of the base-10 representation of k.
0
1, 69, 609, 196833, 241605, 440503, 2374119, 2841633, 3256479, 5529975
OFFSET
1,2
EXAMPLE
sigma(196833) = 331968.
MATHEMATICA
lst = {}; Do[s = ToString@n; d = ToString@DivisorSigma[1, n]; If[StringLength@d == StringLength@d && {}!= StringPosition[s<>s, d], AppendTo[lst, n]], {n, 10^6}]; lst
CROSSREFS
Cf. A000203.
Sequence in context: A211692 A264288 A360359 * A259398 A093269 A108147
KEYWORD
base,nonn,more
AUTHOR
Giovanni Resta, Jan 26 2006
STATUS
approved