A084797 Greatest number formed by concatenating prime factors of n in base 10.

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

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