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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A143445 Triangle read by rows, A051731 * (A001318 * 0^(n-k)); 1<=k<=n. 0
1, 1, 2, 1, 0, 5, 1, 2, 0, 7, 1, 0, 0, 0, 12, 1, 2, 5, 0, 0, 15, 1, 0, 0, 0, 0, 0, 22, 1, 2, 0, 7, 0, 0, 0, 26, 1, 0, 5, 0, 0, 0, 0, 0, 35, 1, 2, 0, 0, 12, 0, 0, 0, 0, 40, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 51, 1, 2, 5, 7, 0, 15, 0, 0, 0, 0, 0, 57 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Row sums = A079248: (1, 3, 6, 10, 13, 23,...)

LINKS

Table of n, a(n) for n=1..78.

FORMULA

Triangle read by rows, A051731 * (A001318 * 0^(n-k)); 1<=k<=n. A051731 = the inverse Mobius transform and (A001318 * 0^(n-k)) = an infinite lower triangular matrix with A001318 (1, 2, 5, 7, 12, 15, 22,...) in the main diagonal and the rest zeros.

EXAMPLE

First few rows of the triangle =

1;

1, 2;

1, 0, 5;

1, 2, 0, 7;

1, 0, 0, 0, 12;

1, 2, 5, 0, 0, 15;

...

CROSSREFS

Cf. A051731, A001318, A079248.

Sequence in context: A113469 A060137 A243821 * A133727 A103185 A130513

Adjacent sequences:  A143442 A143443 A143444 * A143446 A143447 A143448

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Aug 15 2008

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 28 09:52 EST 2020. Contains 331319 sequences. (Running on oeis4.)