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A350424
Numbers for which the number of their semiprime divisors sets a new record.
2
4, 12, 30, 60, 180, 210, 420, 1260, 2310, 4620, 13860, 30030, 60060, 180180, 510510, 1021020, 3063060, 9699690, 19399380, 58198140, 223092870, 446185740, 1338557220, 6469693230, 12939386460, 38818159380, 194090796900, 200560490130, 401120980260, 1203362940780, 6016814703900
OFFSET
1,1
COMMENTS
Aside from the first term a(1)=4, the sequence appears to be a subset of A129912. - Bill McEachen, Dec 31 2021
CROSSREFS
A350425 gives the corresponding number of semiprime divisors.
Sequence in context: A011938 A047177 A048077 * A220264 A367097 A212519
KEYWORD
nonn
AUTHOR
Hugo Pfoertner, Dec 30 2021
STATUS
approved