A359878 a(n) is the index of the smallest tribonacci number (A000073) with exactly n prime factors (counted with multiplicity).

2, 4, 5, 9, 8, 17, 13, 52, 16, 40, 36, 32, 62, 88, 96, 144, 112, 221, 256, 208, 400, 192

Offset

0,1

Links

Table of n, a(n) for n=0..21.

Eric Weisstein's World of Mathematics, Prime Factor

Eric Weisstein's World of Mathematics, Tribonacci Number

Crossrefs

Cf. A000073, A001222, A072396, A359850, A359876, A359879.

Sequence in context: A116920 A116919 A270429 * A270097 A167511 A242398

Adjacent sequences: A359875 A359876 A359877 * A359879 A359880 A359881

Keyword

nonn,more

Author

Ilya Gutkovskiy, Jan 16 2023

Extensions

a(17)-a(21) from Daniel Suteu, Jan 18 2023

Status

approved