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!)
A144034 Eigentriangle read by rows, T(n,k) = A123932(n-k+1)*A046717(k) 0

%I #5 Apr 18 2013 11:25:15

%S 1,4,1,4,4,5,4,4,20,13,4,4,20,52,41,4,4,20,52,164,121,4,4,20,52,164,

%T 484,365,4,4,20,52,164,484,1460,1093,4,4,20,52,164484,1460,4372,3281,

%U 4,4,20,52,164,484,1460,4372,13124,9841

%N Eigentriangle read by rows, T(n,k) = A123932(n-k+1)*A046717(k)

%C Row sums = A046717 shifted: (1, 5, 13, 41, 121,...). Right border = A046717.

%C Sum of n-th row terms = rightmost term of (n+1)-th row.

%F Eigentriangle read by rows, T(n,k) = A123932(n-k+1)*A046717(k)

%e First few rows of the triangle =

%e 1;

%e 4, 1;

%e 4, 4, 5;

%e 4, 4, 20, 13;

%e 4, 4, 20, 52, 41;

%e 4, 4, 20, 52, 164, 121;

%e 4, 4, 20, 52, 164, 484, 365;

%e ...

%e Row 4 = (4, 4, 20, 13) = termwise products (4, 4, 4, 1) and (1, 1, 5, 13).

%Y Cf. A123932, A046717.

%K nonn,tabl

%O 1,2

%A _Gary W. Adamson_, Sep 07 2008

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 September 17 16:03 EDT 2024. Contains 375987 sequences. (Running on oeis4.)