A072307 a(n)-th Fibonacci number is the smallest Fibonacci number containing exactly n 3's.

4, 13, 43, 73, 117, 141, 113, 192, 185, 217, 264, 290, 427, 367, 517, 526, 519, 530, 692, 628, 684, 588, 720, 795, 786, 793, 736, 910, 1004, 1009, 946, 1054, 1330, 1087, 1135, 1134, 1172, 1253, 1299, 1193, 1406, 1502, 1552, 1321, 1377, 1829, 1683, 1731, 1582

Offset

1,1

Links

Alois P. Heinz, Table of n, a(n) for n = 1..1000

Example

a(2)=13 since 13th Fibonacci number 233 contains exactly two 3's.

Crossrefs

Cf. A000045.

Sequence in context: A192802 A149425 A047144 * A355116 A266494 A121486

Adjacent sequences: A072304 A072305 A072306 * A072308 A072309 A072310

Keyword

base,nonn

Author

Shyam Sunder Gupta, Jul 14 2002

Extensions

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

Status

approved