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A122428 Numbers m such that in decimal representation the lexicographically greatest divisor of m equals the greatest prime factor of m. 2
1, 2, 3, 5, 7, 10, 11, 13, 14, 15, 17, 19, 20, 21, 23, 25, 28, 29, 31, 35, 37, 41, 42, 43, 47, 49, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 105, 106, 107, 109, 111, 113, 118, 122, 123, 125, 127, 129, 131, 134, 137, 139, 141, 142, 146, 147, 149, 151, 157, 158 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

A122425(a(n)) = A006530(a(n));

A008578 is a subsequence.

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

PROG

(Haskell)

a122428 n = a122428_list !! (n-1)

a122428_list = [x | x <- [1..], a122425 x == a006530 x]

-- Reinhard Zumkeller, Feb 05 2015

CROSSREFS

Cf. A122425, A006530, A122427.

Sequence in context: A046758 A121232 A298746 * A087246 A090421 A109608

Adjacent sequences:  A122425 A122426 A122427 * A122429 A122430 A122431

KEYWORD

nonn,base

AUTHOR

Reinhard Zumkeller, Sep 04 2006

STATUS

approved

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Last modified March 24 01:20 EDT 2019. Contains 321444 sequences. (Running on oeis4.)