The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 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 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

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

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