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!)
A144522 Sums of pairs of successive digits after the decimal point in the decimal expansion of 2^(1/2) = 1.41421356... 1

%I #7 Aug 19 2019 13:45:19

%S 5,6,4,11,5,10,9,5,12,8,7,16,9,6,9,15,8,15,11,15,8,15,8,13,13,8,10,8,

%T 12,16,10,16,9,10,6,15,10,3,7,3,16,5,11,12,7,5,13,5,12,9,8,1,11,10,5,

%U 9,3,11,7,6,11,12,9,5,13,5,10,9,3,10,5,3,13,7,18,12,13,4,5,5,4,12,14,9

%N Sums of pairs of successive digits after the decimal point in the decimal expansion of 2^(1/2) = 1.41421356...

%H Harvey P. Dale, <a href="/A144522/b144522.txt">Table of n, a(n) for n = 1..1000</a>

%e 4+1=5, 4+2=6, 1+3=4, etc.

%t Total/@Partition[Rest[RealDigits[Sqrt[2],10,171][[1]]],2] (* _Harvey P. Dale_, Aug 19 2019 *)

%Y Cf. A002193.

%K nonn,base

%O 1,1

%A _Juri-Stepan Gerasimov_, Dec 15 2008

%E a(4) changed to 11 and extended by _R. J. Mathar_, Dec 19 2008

%E Edited by _N. J. A. Sloane_, Mar 30 2010

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 May 1 23:54 EDT 2024. Contains 372178 sequences. (Running on oeis4.)