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A322838 Number of positive integers less than n with more prime factors than n, counted with multiplicity. 6
0, 0, 0, 0, 1, 0, 2, 0, 1, 1, 5, 0, 6, 2, 2, 0, 9, 1, 10, 1, 5, 5, 13, 0, 6, 6, 2, 2, 18, 2, 19, 0, 10, 10, 10, 1, 24, 11, 11, 1, 27, 5, 28, 5, 5, 15, 31, 0, 16, 6, 17, 6, 36, 2, 19, 2, 20, 20, 41, 2, 42, 21, 9, 0, 23, 10, 47, 10, 25, 10, 50, 1, 51, 27, 11, 11 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,7
LINKS
EXAMPLE
Column n lists the a(n) positive integers less than n with more prime factors than n:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
---------------------------------------------------------------------
4 6 8 8 10 12 12 12 16 16 18 16
4 9 10 8 8 15 16
8 9 14 15
6 8 12 14
4 6 10 12
4 9 10
8 9
6 8
4 6
4
MATHEMATICA
Table[Length[Select[Range[n], PrimeOmega[#]>PrimeOmega[n]&]], {n, 100}]
CROSSREFS
Positions of zeros appear to be A029744.
Sequence in context: A077762 A244677 A243986 * A085496 A228748 A343464
KEYWORD
nonn
AUTHOR
Gus Wiseman, Dec 28 2018
STATUS
approved

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Last modified March 28 18:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)