login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A075526 A008578(n+2) - A008578(n+1). 13

%I

%S 1,1,2,2,4,2,4,2,4,6,2,6,4,2,4,6,6,2,6,4,2,6,4,6,8,4,2,4,2,4,14,4,6,2,

%T 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,

%U 4,14,6,10,2,4,6,8,6,6,4,6,8,4,8,10,2,10,2,6,4,6,8,4,2,4,12,8,4,8,4,6

%N A008578(n+2) - A008578(n+1).

%C a(n) = A001223(n) for n>0.

%C n appears this number of times in A000720. - _Lekraj Beedassy_, Jun 19 2006

%C a(0) = 1, for n >= 1: a(n) = differences between consecutive primes (A001223(n)) = A158611(n+2) - A158611(n+1). Partial sums of a(n-1) = A006093(n) for n >= 1. [From _Jaroslav Krizek_, Aug 04 2009]

%C First differences of noncomposite numbers. [Juri-Stepan Gerasimov, Feb 17 2010]

%C This is 1 together with A001223. A054541 is 2 together with A001223. A125266 is 3 together with A001223. - _Omar E. Pol_, Nov 01 2013

%Y Cf. A000040, A075527.

%K nonn

%O 0,3

%A _Reinhard Zumkeller_, Sep 22 2002

%E Correction for change of offset in A158611 and A008578 in Aug 2009 _Jaroslav Krizek_, Jan 27 2010

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 January 21 20:07 EST 2019. Contains 319350 sequences. (Running on oeis4.)