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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A236935 The infinite Seidel matrix H read by antidiagonals upwards. 1
1, 0, -1, -1, -1, 0, 0, 1, 2, 2, 5, 5, 4, 2, 0, 0, -5, -10, -14, -16, -16, -61, -61, -56, -46, -32, -16, 0, 0, 61, 122, 178, 224, 256, 272, 272 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,9

COMMENTS

This is, in essence, a signed version of the triangle in A008282.

REFERENCES

L. Seidel, Über eine einfache Enstehungsweise der Bernoullischen Zahlen und einiger verwandten Reihen, Sitzungberichte der Muench.  Akad., Math. Phys. Classe, 1877, pp. 157-187.

LINKS

Table of n, a(n) for n=0..35.

D. Dumont & G. Viennot, A combinatorial interpretation of the Seidel generation of Genocchi numbers, Preprint, Annotated scanned copy.

Dominique Foata and Guo-Niu Han, Seidel Triangle Sequences and Bi-Entringer Numbers, November 20, 2013.

EXAMPLE

Array begins:

     1   -1    0    2    0 -16   0 272 0 ...

     0   -1    2    2  -16 -16 272 272 ...

    -1    1    4  -14  -32 256 544 ...

     0    5  -10  -46  224 800 ...

     5   -5  -56  178 1024 ...

     0  -61  122 1202 ...

   -61   61 1324 ...

     0 1385 ...

  1385 ...

  ...

CROSSREFS

Cf. A008282.

Sequence in context: A116559 A210802 A257943 * A008280 A239005 A213187

Adjacent sequences:  A236932 A236933 A236934 * A236936 A236937 A236938

KEYWORD

sign,more,tabl

AUTHOR

N. J. A. Sloane, Feb 17 2014

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 July 22 10:41 EDT 2019. Contains 325219 sequences. (Running on oeis4.)