

A088076


Smallest prime sandwiched between two numbers having exactly n prime divisors.


1



3, 11, 131, 1429, 77141, 3847271, 117048931, 22917541219, 1771365487891, 140734085123059, 14159733947566481
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OFFSET

1,1


COMMENTS

Different from A088075 though initial three terms match. Sequence is infinite.


REFERENCES

J.M. De Koninck, Ces nombres qui nous fascinent, Entry 131, p. 45, Ellipses, Paris 2008.


LINKS

Table of n, a(n) for n=1..11.


EXAMPLE

a(3) = 131, 130 = 2*5*13 and 132 = 2^2*3*11 both have three prime divisors. 131 is the smallest such prime.


CROSSREFS

Cf. A088075.
Sequence in context: A219620 A201611 A088075 * A276258 A284604 A072878
Adjacent sequences: A088073 A088074 A088075 * A088077 A088078 A088079


KEYWORD

more,nonn


AUTHOR

Amarnath Murthy, Sep 22 2003


EXTENSIONS

More terms from Ray Chandler, Oct 08 2003
a(8) and a(9) from Donovan Johnson, Jun 19 2008
a(10)a(11) from Donovan Johnson, Feb 18 2009


STATUS

approved



