A072309 - OEIS

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A072309

a(n)-th Fibonacci number is the smallest Fibonacci number containing exactly n 5's.

5, 10, 60, 85, 124, 125, 207, 167, 211, 275, 295, 335, 416, 391, 435, 405, 472, 516, 555, 625, 663, 693, 634, 799, 821, 765, 842, 840, 850, 1048, 975, 1037, 851, 1207, 977, 1302, 1194, 1306, 1182, 1185, 1466, 1549, 1237, 1567, 1585, 1485, 1700, 1656, 1636

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Table of n, a(n) for n=1..49.

EXAMPLE

a(2)=10 since 10th Fibonacci number i.e. 55 contains exactly two 5's.

CROSSREFS

Cf. A000045.

Sequence in context: A271295 A354736 A005438 * A328332 A240647 A062162

Adjacent sequences: A072306 A072307 A072308 * A072310 A072311 A072312

KEYWORD

base,nonn

AUTHOR

Shyam Sunder Gupta, Jul 14 2002

EXTENSIONS

a(21)-a(49) from Alois P. Heinz, Apr 26 2017

STATUS

approved