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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A154557 Production array of A122848, read by row. 0
0, 1, 0, 1, 1, 0, -1, 2, 1, 0, 3, -3, 3, 1, 0, -15, 12, -6, 4, 1, 0, 105, -75, 30, -10, 5, 1, 0, -945, 630, -225, 60, -15, 6, 1, 0, 10395, -6615, 2205, -525, 105, -21, 7, 1, 0, -135135, 83160, -26460, 5880, -1050, 168, -28, 8, 1, 0, 2027025, -1216215, 374220, -79380 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,8

REFERENCES

E. Deutsch, L. Ferrari and S. Rinaldi, Production Matrices, Advances in Applied Mathematics, 34 (2005) pp. 101-122

LINKS

Table of n, a(n) for n=0..58.

E. Deutsch, L. Ferrari and S. Rinaldi, Production Matrices and Riordan arrays, arXiv:math/0702638v1, 2007

EXAMPLE

Array starts

0, 1,

0, 1, 1,

0, -1, 2, 1,

0, 3, -3, 3, 1,

0, -15, 12, -6, 4, 1,

0, 105, -75, 30, -10, 5, 1,

0, -945, 630, -225, 60, -15, 6, 1,

0, 10395, -6615, 2205, -525, 105, -21, 7, 1,

0, -135135, 83160, -26460, 5880, -1050, 168, -28, 8, 1

0, 2027025, -1216215, 374220, -79380, 13230, -1890, 252, -36, 9, 1

Square of this array is

0, 1, 1,

0, 0, 3, 1,

0, 0, 0, 5, 1,

0, 0, 0, 0, 7, 1,

0, 0, 0, 0, 0, 9, 1,

0, 0, 0, 0, 0, 0, 11, 1,

0, 0, 0, 0, 0, 0, 0, 13, 1,

0, 0, 0, 0, 0, 0, 0, 0, 15, 1,

0, 0, 0, 0, 0, 0, 0, 0, 0, 17, 1

CROSSREFS

Cf. A113278, A132382, A001147.

Sequence in context: A113020 A228821 A127258 * A049242 A108887 A193401

Adjacent sequences:  A154554 A154555 A154556 * A154558 A154559 A154560

KEYWORD

sign,tabf

AUTHOR

Paul Barry, Jan 11 2009

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 January 23 10:56 EST 2019. Contains 319391 sequences. (Running on oeis4.)