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A020490 phi(n) <= sigma_0(n). 2
1, 2, 3, 4, 6, 8, 10, 12, 18, 24, 30 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

CROSSREFS

Sequence in context: A034287 A067128 A120432 * A014875 A029469 A061953

Adjacent sequences:  A020487 A020488 A020489 * A020491 A020492 A020493

KEYWORD

nonn,fini,full

AUTHOR

David W. Wilson (davidwwilson(AT)comcast.net)

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Last modified February 14 13:08 EST 2012. Contains 205623 sequences.