A154573 a(n) is the first term in a chain of at least n consecutive numbers each with exactly 8 distinct prime factors.

9699690, 65893166030, 10042712381260, 1126299564879684

Offset

1,1

Comments

For exactly 9 distinct prime factors, a(1) = 223092870 and a(2) = 5702759516090.

a(5) > 2 * 10^15. - Toshitaka Suzuki, Jun 23 2025

Links

Table of n, a(n) for n=1..4.

Crossrefs

Cf. A087977, A087978, A138206, A138207.

Sequence in context: A258363 A147575 A046326 * A058332 A058328 A242806

Adjacent sequences: A154570 A154571 A154572 * A154574 A154575 A154576

Keyword

nonn,more

Author

Donovan Johnson, Jan 15 2009

Extensions

a(4) from Toshitaka Suzuki, Jun 23 2025

Status

approved