A072321 Smallest Fibonacci number containing exactly n 2's.

2, 514229, 12586269025, 14472334024676221, 2427893228399975082453, 57602132235424755886206198685365216, 1033628323428189498226463595560281832, 2353412818241252672952597492098, 2281217241465037496128651402858212007295

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..18

Example

a(2)=514229 so 514229 is the smallest Fibonacci number containing exactly two 2's.

Mathematica

Flatten[Table[Select[Fibonacci[Range[500]], DigitCount[#, 10, 2]==n&, 1], {n, 10}]] (* Harvey P. Dale, Feb 22 2014 *)

Crossrefs

Sequence in context: A139181 A172994 A214545 * A237191 A367823 A101118

Adjacent sequences: A072318 A072319 A072320 * A072322 A072323 A072324

Keyword

base,nonn

Author

Shyam Sunder Gupta, Jul 14 2002

Extensions

a(9) from Vincenzo Librandi, Feb 23 2014

Status

approved