login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A096380 Differences between the sum of the first three primes and the fourth prime in consecutive prime quadruples. 0

%I #9 Nov 22 2023 11:04:14

%S 3,4,10,14,22,26,30,40,46,56,66,74,78,84,98,106,116,126,132,140,146,

%T 154,168,184,194,202,206,202,218,234,256,258,274,282,294,304,314,324,

%U 338,342,358,368,382,378,384,406,432,446,450,460,462,474,486,502,518,526

%N Differences between the sum of the first three primes and the fourth prime in consecutive prime quadruples.

%C There are occurrences where the next term is less than the current term. Conjecture: The number of occurrences where the current term exceeds the next term is infinite.

%F a(n) = prime(n) + prime(n+1) + prime(n+2) - prime(n+3).

%F a(n) = Sum_{k=0..3} (-1)^A121262(k+1) * prime(n+k). - _Wesley Ivan Hurt_, Nov 22 2023

%t Total[Take[#,3]]-Last[#]&/@Partition[Prime[Range[100]],4,1] (* _Harvey P. Dale_, May 14 2011 *)

%o (PARI) g(n)=for(x=1,n,print1(prime(x)+prime(x+1)+prime(x+2)-prime(x+3)","))

%Y Cf. A000040, A121262.

%K nonn,easy

%O 1,1

%A _Cino Hilliard_, Aug 04 2004

%E Offset set to 1 by _Wesley Ivan Hurt_, Nov 22 2023

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)