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A019292 Let sigma_m (n) be result of applying sum-of-divisors function m times to n; call n (m,k)-perfect if sigma_m (n) = k*n; sequence gives the (3,k)-perfect numbers. +0
1
1, 12, 14, 24, 52, 98, 156, 294, 684, 910, 1368, 1440, 4480, 4788, 5460, 5840, 6882, 7616, 9114, 14592, 18288, 22848, 32704, 40880, 52416, 53760, 54864, 56448, 60960, 65472, 94860, 120960, 122640, 169164, 185535, 186368, 194432 (list; graph; listen)
OFFSET

1,2

COMMENT

See also the Cohen-te Reile links under A019276.

REFERENCES

Graeme L. Cohen and Herman J. J. te Riele, Iterating the sum-of-divisors function, Experimental Mathematics, 5 (1996), pp. 93-100.

LINKS

Experimental Mathematics, Home Page

CROSSREFS

Sequence in context: A078417 A107835 A101557 this_sequence A022326 A127401 A106135

Adjacent sequences: A019289 A019290 A019291 this_sequence A019293 A019294 A019295

KEYWORD

nonn

AUTHOR

njas

page 1

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Last modified December 4 12:27 EST 2008. Contains 151280 sequences.


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