A361395 - OEIS

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A361395

Positive integers k such that 2*omega(k) >= bigomega(k).

1, 2, 3, 4, 5, 6, 7, 9, 10, 11, 12, 13, 14, 15, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 28, 29, 30, 31, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 65, 66, 67, 68, 69, 70, 71, 73, 74

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

Differs from A068938 in having 1 and 4 and lacking 80.

Includes all squarefree numbers.

LINKS

Table of n, a(n) for n=1..67.

FORMULA

A001222(a(n)) <= 2*A001221(a(n)).

EXAMPLE

The prime indices of 80 are {1,1,1,1,3}, with 5 parts and 2 distinct parts, and 2*2 < 5, so 80 is not in the sequence.