A072232 - OEIS

A072232

Smallest factorial containing exactly n 9's.

479001600, 39916800, 51090942171709440000, 8841761993739701954543616000000, 295232799039604140847618609643520000000, 5502622159812088949850305428800254892961651752960000000000, 371993326789901217467999448150835200000000

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..7.

EXAMPLE

a(2)=39916800 so 39916800 is the smallest factorial containing exactly two 9's.

MATHEMATICA

With[{fs=Range[100]!}, Flatten[Table[Select[fs, DigitCount[#, 10, 9]==n&, 1], {n, 10}]]] (* Harvey P. Dale, Mar 12 2013 *)

CROSSREFS

Sequence in context: A091677 A147717 A127888 * A011523 A172535 A181728

Adjacent sequences: A072229 A072230 A072231 * A072233 A072234 A072235

KEYWORD

base,nonn

AUTHOR

Shyam Sunder Gupta, Jul 30 2002

EXTENSIONS

More terms from Harvey P. Dale, Mar 12 2013

STATUS

approved