login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A133599 A097806 * A133080 * A007318. 3
1, 3, 1, 3, 3, 1, 3, 7, 5, 1, 3, 9, 10, 5, 1, 3, 13, 22, 18, 7, 1, 3, 15, 31, 34, 21, 7, 1, 3, 19, 51, 75, 65, 33, 9, 1, 3, 21, 64, 111, 120, 83, 36, 9, 1, 3, 25, 92, 196, 266, 238, 140, 52, 11, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row sums = A133600: (1, 4, 7, 16, 28, 64, 112,...).

LINKS

Table of n, a(n) for n=1..55.

FORMULA

A097806 * A133080 * A007318 as infinite lower triangular matrices, where A097806 = the pairwise operator and A133080 = an interpolation operator.

EXAMPLE

First few rows of the triangle are:

1;

3, 1;

3, 3, 1;

3, 7, 5, 1;

3, 9, 10, 5, 1;

3, 13, 22, 18, 7, 1;

...

MAPLE

A133599aux := proc(n, k)

    add(A097806(n, j)*A133080(j, k), j=k..n) ;

end proc:

A133599 := proc(n, k)

    add(A133599aux(n, j)*binomial(j-1, k-1), j=k..n) ;

end proc: # R. J. Mathar, Jun 20 2015

CROSSREFS

Cf. A097806, A133080, A133600.

Sequence in context: A274773 A132752 A131241 * A256399 A050306 A205453

Adjacent sequences:  A133596 A133597 A133598 * A133600 A133601 A133602

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Sep 18 2007

STATUS

approved

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 October 19 16:17 EDT 2019. Contains 328223 sequences. (Running on oeis4.)