A096991 - OEIS

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A096991

Initial values for f(x)=sigma(phi[x])=A062402[x] such that iteration of f ends in cycle of length=4.

0

401, 451, 489, 491, 505, 513, 567, 577, 629, 631, 652, 661, 673, 679, 685, 691, 713, 731, 737, 751, 757, 769, 773, 791, 802, 808, 811, 817, 825, 829, 833, 847, 851, 853, 859, 867, 869, 871, 873, 877, 889, 893, 899, 901, 902, 907, 911, 917, 919, 923, 931

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..51.

CROSSREFS

Cf. A062402, A096926.

Sequence in context: A296904 A159890 A029705 * A332674 A141026 A158313

Adjacent sequences: A096988 A096989 A096990 * A096992 A096993 A096994

KEYWORD

nonn

AUTHOR

Labos Elemer, Jul 19 2004

STATUS

approved