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!)
A117937 Triangle, rows = inverse binomial transforms of A117938 columns. 4

%I

%S 1,1,1,3,3,2,4,10,12,6,7,27,58,60,24,11,71,240,420,360,120,18,180,920,

%T 2460,3504,2520,720,29,449,3360,13020,27720,32760,20160,5040,47,1107,

%U 11898,64620,194184,337680,338400,181440,40320,76,2710,41268,307194,1257120,3029760,4415040

%N Triangle, rows = inverse binomial transforms of A117938 columns.

%C A117936 is the companion triangle using analogous Fibonacci polynomials. Left border of A117936 = the Lucas numbers; right border = factorials.

%C [Note that most of the comments here and in many related sequences by the same author refer to some unusual definition of binomial transforms for sequences starting at index 1. - _R. J. Mathar_, Jul 05 2012]

%F Rows of the triangle are inverse binomial transforms of A117938 columns. A117938 columns are generated from f(x), Lucas polynomials: (1); (x); (x^2 + 2); (x^3 + 3x); (x^4 + 4x + 2);...

%e First few rows of the triangle are:

%e 1;

%e 1, 1;

%e 3, 3, 2;

%e 4, 10, 12, 6;

%e 7, 27, 58, 60, 24;

%e 11, 71, 240, 420, 360, 120;

%e ...

%e For example, row 4: (4, 10, 12, 6) = the inverse binomial transform of column 4 of A117938: (4, 14, 36, 76, 140...), being f(x), x =1,2,3...using the Lucas polynomial x^3 + 3x.

%p A117937 := proc(n,k)

%p add( A117938(n+i,n)*binomial(k-1,i)*(-1)^(1+i-k),i=0..k-1) ;

%p end proc:

%p seq(seq(A117937(n,k),k=1..n),n=1..13) ; # _R. J. Mathar_, Aug 16 2019

%Y Cf. A117936, A117938.

%K nonn,tabl,easy

%O 1,4

%A _Gary W. Adamson_, Apr 04 2006

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 June 6 17:28 EDT 2020. Contains 334830 sequences. (Running on oeis4.)