A066963 Start of a record-breaking run of consecutive composite integers with an odd number of prime factors.

8, 27, 170, 242, 2522, 5882, 18238, 48513, 61532, 506517, 752714, 1213848, 3098613, 5481504, 78214964, 103886546, 118689518, 1608906624, 3939877246, 7964728742, 166384601987, 250060982098

Offset

1,1

Comments

a(23) > 10^12. [Donovan Johnson, Oct 11 2010]

Links

Table of n, a(n) for n=1..22.

Example

a(3)=170 because this is the start of third record breaking run of consecutive composite integers (170,171,172) with an odd number of prime factors (170=2*5*17, 171=3*3*19, 172=2*2*43).

Crossrefs

Cf. A066793, A066794.

Sequence in context: A056570 A343318 A165048 * A067813 A304769 A118720

Adjacent sequences: A066960 A066961 A066962 * A066964 A066965 A066966

Keyword

more,nonn

Author

Shyam Sunder Gupta, Jan 27 2002

Extensions

a(18)-a(21) from Donovan Johnson, Sep 09 2008

a(22) from Donovan Johnson, Oct 11 2010

Status

approved