login
This site is supported by donations to The OEIS Foundation.
Logo

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A095862 Numbers n such that number of decimal digits of n = number of divisors of n. 12
1, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 121, 169, 289, 361, 529, 841, 961, 1003, 1006, 1007, 1011, 1018, 1027, 1037, 1041, 1042, 1043, 1046, 1047, 1055, 1057, 1059, 1067, 1073, 1077, 1079, 1081, 1082, 1094, 1099 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

An element of this sequence is prime iff it has 2 digits, which is the case for a(2)=11 through a(22) ; sequence A096489 lists exactly these and the leading term a(1)=1 (the only noncomposite number which is not prime). - M. F. Hasler, Nov 29 2007

LINKS

Table of n, a(n) for n=1..52.

CROSSREFS

Cf. A096489 (= a(1)..a(22) = noncomposite elements of this sequence).

Cf. A135772-A135779 (analogue for bases 2...9).

Sequence in context: A008364 A140461 A120533 * A125845 A108871 A167847

Adjacent sequences:  A095859 A095860 A095861 * A095863 A095864 A095865

KEYWORD

base,nonn

AUTHOR

Ray Chandler, Jun 28 2004

EXTENSIONS

Edited by M. F. Hasler, Nov 29 2007

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified May 25 20:22 EDT 2013. Contains 225649 sequences.