A072320 Smallest Fibonacci number containing exactly n 3's.

3, 233, 433494437, 806515533049393, 1264937032042997393488322, 131151201344081895336534324866, 184551825793033096366333, 5972304273877744135569338397692020533504, 205697230343233228174223751303346572685, 1001919737325604309473206237898433933302481297

Offset

1,1

Links

Table of n, a(n) for n=1..10.

Example

a(2)=233 so 233 is the smallest Fibonacci number containing exactly two 3's.

Mathematica

With[{fibs=Fibonacci[Range[1000]]}, Flatten[Table[Select[fibs, DigitCount[ #, 10, 3] == n&, 1], {n, 10}]]] (* Harvey P. Dale, May 05 2013 *)

Crossrefs

Sequence in context: A100201 A159807 A065580 * A162603 A252585 A339751

Adjacent sequences: A072317 A072318 A072319 * A072321 A072322 A072323

Keyword

base,nonn

Author

Shyam Sunder Gupta, Jul 14 2002

Extensions

More terms from Harvey P. Dale, May 05 2013

Status

approved