A098010 Record lengths of transient part of aliquot sequences corresponding to entries in A098009.

1, 2, 3, 4, 7, 15, 18, 178

Offset: 1

Author

N. J. A. Sloane, Sep 10 2004

Keywords

• nonn
• more

Examples

			138 has a transient of length 177 (see Guy's book).
		

Crossrefs

See A098009 for discussion, see A098008 for references.

Programs

Mathematica

g[n_] := If[n > 0, DivisorSigma[1, n] - n, 0]; f[n_] := NestWhileList[g, n, UnsameQ, All]; a = -1; Do[b = Length[ f[n]] - 2; If[b > a, a = b; Print[b]], {n, 275}] (* Robert G. Wilson v, Sep 10 2004 *)

Extensions

18 and 178 from Robert G. Wilson v, Sep 10 2004