A359881 a(n) is the index of the smallest Fibonacci n-step number with exactly n prime factors (counted with multiplicity).

8, 9, 10, 12, 17, 18, 29, 24, 38, 30, 45, 39, 41, 45, 61, 50, 67, 73, 77, 82, 62, 60, 71, 70, 127, 161, 112, 111, 86, 154, 91, 127, 99, 100, 141, 109, 109, 115, 159, 122, 122, 125, 131, 133, 134, 329, 138, 147, 196, 407, 150, 256, 320, 165, 163, 223, 170, 173

Offset

2,1

Links

Table of n, a(n) for n=2..59.

Eric Weisstein's World of Mathematics, Fibonacci n-Step Number

Eric Weisstein's World of Mathematics, Prime Factor

Crossrefs

Cf. A001222, A072396, A359853, A359878, A359879, A359880.

Sequence in context: A169928 A067683 A338026 * A164276 A154967 A271211

Adjacent sequences: A359878 A359879 A359880 * A359882 A359883 A359884

Keyword

nonn

Author

Ilya Gutkovskiy, Jan 16 2023

Extensions

a(24)-a(59) from Daniel Suteu, Jan 18 2023

Status

approved