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A084797 Greatest number formed by concatenating prime factors of n in base 10. 4
1, 2, 3, 22, 5, 32, 7, 222, 33, 52, 11, 322, 13, 72, 53, 2222, 17, 332, 19, 522, 73, 211, 23, 3222, 55, 213, 333, 722, 29, 532, 31, 22222, 311, 217, 75, 3322, 37, 219, 313, 5222, 41, 732, 43, 2211, 533, 232, 47, 32222, 77, 552, 317, 2213, 53, 3332, 511, 7222 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Alois P. Heinz, Table of n, a(n) for n = 1..20000

MAPLE

with(combinat):

a:= n-> `if`(n=1, 1, max(map(x-> parse(cat(x[])),

    permute([seq(i[1]$i[2], i=ifactors(n)[2])]))[])):

seq(a(n), n=1..100);  # Alois P. Heinz, May 02 2016

CROSSREFS

Different from A084796. Cf. A073646.

Sequence in context: A037276 A068190 A084796 * A163902 A154865 A032810

Adjacent sequences:  A084794 A084795 A084796 * A084798 A084799 A084800

KEYWORD

nonn,look,base

AUTHOR

N. J. A. Sloane, Jul 19, 2003

EXTENSIONS

More terms from Alois P. Heinz, May 02 2016

STATUS

approved

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Last modified January 17 14:12 EST 2019. Contains 319225 sequences. (Running on oeis4.)