login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A106522 A Pascal type matrix based on the tribonacci numbers. 3

%I

%S 1,1,1,2,2,1,4,4,3,1,7,8,7,4,1,13,15,15,11,5,1,24,28,30,26,16,6,1,44,

%T 52,58,56,42,22,7,1,81,96,110,114,98,64,29,8,1,149,177,206,224,212,

%U 162,93,37,9,1,274,326,383,430,436,374,255,130,46,10,1,504,600,709,813,866,810

%N A Pascal type matrix based on the tribonacci numbers.

%C Row sums are A001590(n+3), diagonal sums are A106523. Row sums of A106522 mod 2 are A106524.

%F Riordan array (1/(1-x-x^2-x^3), x/(1-x)); Number triangle T(n, 0)=A000073(n+2), T(n, k)=T(n-1, k-1)+T(n-1, k).

%e Triangle begins

%e 1;

%e 1,1;

%e 2,2,1;

%e 4,4,3,1;

%e 7,8,7,4,1;

%e 13,13,15,11,5,1;

%K easy,nonn,tabl

%O 0,4

%A _Paul Barry_, May 06 2005

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 14 19:48 EDT 2020. Contains 335729 sequences. (Running on oeis4.)