login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A317963 First differences of A304360. 2
2, 1, 3, 2, 3, 3, 1, 3, 3, 2, 1, 5, 1, 2, 3, 3, 3, 3, 1, 3, 2, 9, 1, 2, 1, 2, 1, 5, 1, 5, 1, 5, 1, 3, 3, 2, 6, 3, 1, 3, 2, 4, 2, 7, 2, 1, 3, 2, 4, 2, 1, 9, 2, 1, 2, 4, 3, 2, 3, 4, 2, 1, 2, 6, 1, 2, 3, 1, 3, 5, 4, 3, 6, 2, 6, 1, 3, 3, 2, 3, 1, 3, 3, 2, 6, 3, 4, 2, 1, 5, 1, 3, 3, 5, 1, 2, 1, 2, 3 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Always positive (see A304360).

LINKS

Robert Israel, Table of n, a(n) for n = 1..10000

MAPLE

A304360:= NULL: count:= 0:

P:= {}:

for n  from 2 while count < 201 do

  pn:= numtheory:-factorset(n);

  if pn intersect P = {} then

    count:= count+1;

    A304360:= A304360, n;

    P:= P union {ithprime(n)};

  fi

od:

A304360:= [A304360]:

A304360[2..-1]-A304360[1..-2]; # Robert Israel, Aug 26 2018

CROSSREFS

Cf. A304360.

Sequence in context: A188637 A083290 A121842 * A219609 A087825 A263100

Adjacent sequences:  A317960 A317961 A317962 * A317964 A317965 A317966

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Aug 26 2018

EXTENSIONS

More terms from Robert Israel, Aug 26 2018

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 18 11:58 EDT 2021. Contains 345098 sequences. (Running on oeis4.)