A359851 a(n) is the index of the smallest tetranacci number (A000078) with exactly n distinct prime factors.

3, 5, 8, 15, 20, 30, 53, 60, 80, 89, 130, 252

Offset: 0

Author

Ilya Gutkovskiy, Jan 15 2023

Keywords

• nonn
• more

Links

• Eric Weisstein's World of Mathematics, Distinct Prime Factors
• Eric Weisstein's World of Mathematics, Tetranacci Number

Crossrefs

Cf. A000078, A001221, A060320, A359849, A359850.

Extensions

a(11) from Daniel Suteu, Jan 17 2023