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

 

Logo

Please make a donation to keep the OEIS running. We are now in our 56th year. In the past year we added 10000 new sequences and reached almost 9000 citations (which often say "discovered thanks to the OEIS").
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A128521 A128174 * A054525 * A000012. 1
1, 0, 1, 1, 1, 1, 0, 1, 1, 1, 1, 2, 2, 1, 1, 0, 0, 1, 2, 1, 1, 1, 3, 3, 2, 2, 1, 1, 0, 0, 1, 2, 2, 2, 1, 1, 1, 3, 3, 3, 3, 2, 2, 1, 1, 0, -1, 1, 2, 2, 3, 2, 2, 1, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,12

COMMENTS

Row sums = A106477: (1, 1, 3, 3, 7, 5, 13, 9, 19, 13,...). A128522 = A054525 * A128174 * A000012

LINKS

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

FORMULA

A128174 * A054525 * A000012 as infinite lower triangular matrices.

EXAMPLE

First few rows of the triangle are:

1;

0, 1;

1, 1, 1;

0, 1, 1, 1;

1, 2, 2, 1, 1;

0, 0, 1, 2, 1, 1;

1, 3, 3, 2, 2, 1, 1;

0, 0, 1, 2, 2, 2, 1, 1;

...

CROSSREFS

Cf. A128174, A054525, A000012, A106477, A128522.

Sequence in context: A030353 A089617 A274370 * A090477 A293019 A087479

Adjacent sequences:  A128518 A128519 A128520 * A128522 A128523 A128524

KEYWORD

tabl,sign

AUTHOR

Gary W. Adamson, Mar 07 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 December 5 12:51 EST 2020. Contains 338947 sequences. (Running on oeis4.)