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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A136172 Column 1 of triangle A136170. 3

%I

%S 1,2,9,105,2702,154609,19092682,5161046609,3089394167519,

%T 4175309542037953,12956948188014836324,93772653247517510010693,

%U 1603175184493001749597050954,65450800470044797091307950768285

%N Column 1 of triangle A136170.

%o (PARI) /* Generate using matrix power method: */ a(n)=local(A=Mat(1), B); for(m=1, n+2, B=matrix(m, m); for(i=1, m, for(j=1, i, if(j==i, B[i, j]=1, B[i, j]=(A^(fibonacci(i-1)))[i-1, j]); )); A=B); return( ((A)[n+2, 2]))

%o (PARI) /* Generate using partial sums method: */ a(n)=local(A=vector(n+1), p); A[1]=1; for(j=1, n, p=fibonacci(n+3)-fibonacci(n-j+3)-j; A=Vec((Polrev(A)+x*O(x^p))/(1-x))); A[ #A]

%Y Cf. A136170, A136171, A136173.

%K nonn

%O 0,2

%A _Paul D. Hanna_, Dec 17 2007

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.

Last modified June 22 21:29 EDT 2021. Contains 345393 sequences. (Running on oeis4.)