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!)
A281878 The sum of two successive terms is prime and the sum of two successive digits is also prime. 1

%I #16 Jun 26 2019 00:39:19

%S 0,2,1,4,3,8,5,6,7,412,9,20,21,16,111,112,121,120,29,212,11,12,125,

%T 234,149,230,203,216,143,258,305,252,167,432,161,116,123,214,165,202,

%U 129,238,303,298,321,250,207,434,323,294,307,612,325,232,141,256,505,292,147,416,503,438,349,474,347,414,329,492,385,676,525,656,507

%N The sum of two successive terms is prime and the sum of two successive digits is also prime.

%C The sequence is started with a(1)=0 and always extended with the smallest integer not yet present in the sequence and not leading to a contradiction.

%H Jean-Marc Falcoz, <a href="/A281878/b281878.txt">Table of n, a(n) for n = 1..10001</a>

%e Prime sum of successive terms:

%e 0+2 is prime; 2+1 is prime; 1+4 is prime; ... 6+7 is prime; 7+412 is prime; 412+9 is prime; etc.

%e Prime sum of successive digits: 0+2 is prime; 2+1 is prime; 1+4 is prime; ... 6+7 is prime; 7+4 is prime; 4+1 is prime; 1+2 is prime; etc.

%Y Cf. A217555.

%K nonn,base

%O 1,2

%A _Eric Angelini_ and _Jean-Marc Falcoz_, Feb 01 2017

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 23 11:35 EDT 2024. Contains 371912 sequences. (Running on oeis4.)