A072244 Smallest factorial containing exactly n 4's.

24, 121645100408832000, 51090942171709440000, 620448401733239439360000, 2658271574788448768043625811014615890319638528000000000, 1405006117752879898543142606244511569936384000000000, 30414093201713378043612608166064768844377641568960512000000000000, 40526919504877216755680601905432322134980384796226602145184481280000000000000

Offset

1,1

Links

Table of n, a(n) for n=1..8.

Example

a(2)=121645100408832000 so 121645100408832000 is the smallest factorial containing exactly two 4's.

Mathematica

Table[SelectFirst[Table[With[{c=n!}, {c, DigitCount[c, 10, 4]}], {n, 100}], #[[2]] == k&], {k, 8}][[All, 1]] (* Harvey P. Dale, Nov 18 2021 *)

Crossrefs

Sequence in context: A013910 A007458 A273725 * A067669 A068741 A255403

Adjacent sequences: A072241 A072242 A072243 * A072245 A072246 A072247

Keyword

base,nonn

Author

Shyam Sunder Gupta, Jul 30 2002

Extensions

More terms from Harvey P. Dale, Nov 18 2021

Status

approved