

A125266


Number of repetitions in A007918.


2



3, 1, 2, 2, 4, 2, 4, 2, 4, 6, 2, 6, 4, 2, 4, 6, 6, 2, 6, 4, 2, 6, 4, 6, 8, 4, 2, 4, 2, 4, 14, 4, 6, 2, 10, 2, 6, 6, 4, 6, 6, 2, 10, 2, 4, 2, 12, 12, 4, 2, 4, 6, 2, 10, 6, 6, 6, 2, 6, 4, 2, 10, 14, 4, 2, 4, 14, 6, 10, 2, 4, 6, 8, 6, 6, 4, 6, 8, 4, 8, 10, 2, 10, 2, 6, 4, 6, 8, 4, 2, 4, 12, 8, 4, 8
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OFFSET

1,1


COMMENTS

Except for the first 2 terms, these numbers are always even. Conjecture: the number 2 occurs infinitely often in this sequence.
Essentially the same as A075526 and A054541.  R. J. Mathar, Jun 15 2008
3 together with A001223.  Omar E. Pol, Nov 01 2013


LINKS

Table of n, a(n) for n=1..95.


EXAMPLE

A007918(0) = 2, A007918(1)=2, A007918(2) = 2. So 2 repeats 3 times, giving 3 as the first term in the table.


PROG

(PARI) nextprimerep(n) = { local(x, y, y1, c=0); y1=2; for(x=0, n, y=nextprime(x); if(y==y1, c++, y1=y; print1(c", "); c=1); ) }


CROSSREFS

Cf. A007918.
Sequence in context: A010280 A318556 A292148 * A002016 A282016 A238848
Adjacent sequences: A125263 A125264 A125265 * A125267 A125268 A125269


KEYWORD

easy,nonn


AUTHOR

Cino Hilliard, Jan 15 2007


STATUS

approved



