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!)
A130210 Triangle read by rows: matrix product A051731 * A130209. 1
1, 1, 2, 1, 0, 2, 1, 2, 0, 3, 1, 0, 0, 0, 2, 1, 2, 2, 0, 0, 4, 1, 0, 0, 0, 0, 0, 2, 1, 2, 0, 3, 0, 0, 0, 4, 1, 0, 2, 0, 0, 0, 0, 0, 3, 1, 2, 0, 0, 2, 0, 0, 0, 0, 4, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 1, 2, 2, 3, 0, 4, 0, 0, 0, 0, 0, 6, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 1, 2 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..93.

FORMULA

Inverse Moebius transform of A130209.

T(n,n) = A000005(n).

EXAMPLE

First few rows of the triangle are:

1;

1, 2;

1, 0, 2;

1, 2, 0, 3;

1, 0, 0, 0, 2;

1, 2, 2, 0, 0, 4;

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

...

MAPLE

A130210 := proc(n, k)

    add( A051731(n, j)*A130209(j, k), j=k..n) ;

end proc:

seq(seq(A130210(n, k), k=1..n), n=1..15) ;  # R. J. Mathar, Aug 06 2016

CROSSREFS

Cf. A000005, A007425 (row sums).

Sequence in context: A230025 A330374 A207869 * A236459 A190427 A287108

Adjacent sequences:  A130207 A130208 A130209 * A130211 A130212 A130213

KEYWORD

nonn,tabl,easy

AUTHOR

Gary W. Adamson, May 17 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 June 18 10:54 EDT 2021. Contains 345098 sequences. (Running on oeis4.)