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!)
A133128 Triangle of first differences of A120070 with a leftmost column of A002522. 2

%I #8 Sep 17 2015 03:02:31

%S 2,5,-3,10,-3,-5,17,-3,-5,-7,26,-3,-5,-7,-9,37,-3,-5,-7,-9,-11,50,-3,

%T -5,-7,-9,-11,-13,65,-3,-5,-7,-9,-11,-13,-15,82,-3,-5,-7,-9,-11,-13,

%U -15,-17,101,-3,-5,-7,-9,-11,-13,-15,-17,-19,122,-3,-5,-7,-9,-11,-13,-15,-17,-19,-21,145,-3,-5,-7,-9,-11,-13,-15,-17,-19,-21,-23,170,-3,-5,-7,-9,-11,-13

%N Triangle of first differences of A120070 with a leftmost column of A002522.

%C The flattened triangle is essentially the same as A141620.

%F T(n,0) = A002522(n+1).

%F T(n,m) = -2m-1, m>0 .

%F sum_{m=0..n} T(n,m) = 2 (row sums).

%F T(n,n) = -A005408(n), n>0.

%e The triangle starts

%e 2;

%e 5, -3;

%e 10,-3,-5;

%e 17,-3,-5,-7;

%e 26,-3,-5,-7,-9;

%p A133128 := proc(n,m) if m>= 1 then -2*m-1 ; else (n+1)^2+1 ; fi; end: seq(seq(A133128(n,m),m=0..n),n=0..15) ; # _R. J. Mathar_, Nov 22 2009

%K sign,tabl,less,easy

%O 0,1

%A _Paul Curtz_, Aug 27 2008

%E Edited and extended by _R. J. Mathar_, Nov 22 2009

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 23:26 EDT 2024. Contains 371917 sequences. (Running on oeis4.)