login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A178223 Numbers n such that the digits of n are also digits of n! (counting multiplicity). 0
1, 2, 4, 20, 21, 22, 23, 24, 25, 26, 27, 30, 31, 32, 33, 34, 35, 36, 37, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..93.

EXAMPLE

23 is in the sequence because 2 and 3 are digits of 23! = 25852016738884976640000 ;

28 is not in the sequence because 2 is not a digit of 28! = 304888344611713860501504000000.

11 is not in the sequence because 11! = 39916800 contains only a single "1".

MATHEMATICA

Reap[Do[a = DigitCount[n!]; b = DigitCount[n]; If[Min[a-b] >= 0, Sow[n]], {n, 1, 10^3}]][[2, 1]]

CROSSREFS

Cf. A064827

Sequence in context: A316389 A133521 A122158 * A033180 A215815 A295826

Adjacent sequences: A178220 A178221 A178222 * A178224 A178225 A178226

KEYWORD

nonn,base

AUTHOR

Michel Lagneau, Dec 20 2010

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 30 04:12 EDT 2023. Contains 361603 sequences. (Running on oeis4.)