

A097619


Numbers having more prime factors than each of their neighbors.


3



4, 6, 8, 12, 16, 18, 20, 24, 30, 32, 36, 40, 42, 48, 50, 52, 54, 56, 60, 64, 66, 68, 70, 72, 78, 80, 84, 88, 90, 92, 96, 100, 102, 104, 108, 110, 112, 114, 120, 126, 128, 130, 132, 138, 140, 144, 150, 152, 156, 160, 162, 168, 176, 180, 182, 184, 186, 189, 192, 196
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OFFSET

1,1


COMMENTS

Even terms are much more frequent. Among first 10000 terms exactly 612 are odd. First odd terms are 189, 243, 315, 405, 525, 567, 675; corresponding indices are 58, 77, 102, 130, 169, 182, 216.  Zak Seidov, Mar 06 2015


LINKS

Zak Seidov, Table of n, a(n) for n = 1..10000


EXAMPLE

A001222(50)=A001222(2*5*5)=3 > A001222(501)=A001222(7*7)=2 and A001222(50) > A001222(50+1)=A001222(3*17)=2, therefore 50 is a term.


CROSSREFS

Cf. A097620, A076082, A001222.
Sequence in context: A100390 A199768 A157932 * A113709 A076082 A162648
Adjacent sequences: A097616 A097617 A097618 * A097620 A097621 A097622


KEYWORD

nonn


AUTHOR

Reinhard Zumkeller, Aug 17 2004


STATUS

approved



