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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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified April 18 03:59 EDT 2021. Contains 343072 sequences. (Running on oeis4.)