

A085889


Highly composite numbers (A002473) using digits in increasing order. 9 is followed by a zero.


1



1, 2, 3, 4, 5, 6, 7, 8, 9, 12, 45, 56, 90, 567, 3456
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OFFSET

1,2


COMMENTS

No more terms < 10^1000. Probably no more terms.  David Wasserman, Feb 10 2005


LINKS

Table of n, a(n) for n=1..15.


EXAMPLE

567 is a member as 567 = 3^4*7.


PROG

(PARI) hcn(n) = while (!(n%2), n \=2); while (!(n%3), n \=3); while (!(n%5), n \=5); while (!(n%7), n \=7); n == 1; for (i = 0, 1000, for (j = 1, 9, n = sum(k = j, i + j, (k%10)*10^(i + j  k)); if (hcn(n), print(n)))); /* David Wasserman */


CROSSREFS

Cf. A002473, A085890.
Sequence in context: A302504 A165307 A081549 * A342951 A342264 A094823
Adjacent sequences: A085886 A085887 A085888 * A085890 A085891 A085892


KEYWORD

base,nonn


AUTHOR

Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), Jul 10 2003


EXTENSIONS

3456 from David Wasserman, Feb 10 2005


STATUS

approved



