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Search: id:A090556
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A090556 Beginning with 1, a(n) = least number m > a(n-1) such that phi(a(n-1)) divides phi(m). +0
2
1, 2, 3, 4, 5, 8, 10, 12, 13, 21, 26, 28, 35, 39, 45, 52, 56, 65, 97, 119, 153, 193, 221, 291, 357, 386, 388, 416, 442, 448, 476, 485, 579, 595, 663, 765, 769, 965, 1105, 1455, 1538, 1544, 1552, 1649, 1799, 2307, 2313, 2895, 3076, 3088, 3104, 3281, 3341, 3845, 4947 (list; graph; listen)
OFFSET

1,2

CROSSREFS

Cf. A090555, A090557.

Sequence in context: A005233 A155736 A074897 this_sequence A080713 A058664 A035562

Adjacent sequences: A090553 A090554 A090555 this_sequence A090557 A090558 A090559

KEYWORD

nonn

AUTHOR

Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Dec 10 2003

EXTENSIONS

Corrected and extended by Sam Handler (sam_5_5_5_0(AT)yahoo.com), Nov 03 2004

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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