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

 

Logo

110 people attended OEIS-50 (videos, suggestions); annual fundraising drive to start soon (donate); editors, please edit! (stack is over 300), your editing is more valuable than any donation.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A139331 Triangle read by rows: ConvOffsStoT transform of A103505. 0
1, 1, 1, 1, 1, 1, 1, 2, 2, 1, 1, 6, 12, 6, 1, 1, 12, 72, 72, 12, 1, 1, 20, 240, 720, 240, 20, 1, 1, 30, 600, 3600, 3600, 600, 30, 1, 1, 56, 1680, 16800, 33600, 16800, 1680, 56, 1, 1, 72, 4032, 60480, 201600, 201600, 60480, 4032, 72, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,8

LINKS

Table of n, a(n) for n=0..54.

EXAMPLE

First few rows of the triangle are:

1;

1, 1;

1, 1, 1;

1, 2, 2, 1;

1, 6, 12, 6, 1;

1, 12, 72, 72, 12, 1;

1, 20, 240, 720, 240, 20, 1;

1, 30, 600, 3600, 3600, 600, 30, 1;

...

Row 4 = (1, 6, 12, 6, 1) since ConvOffs transform of (1, 1, 2, 6) = (1, 6, 12, 6, 1); where A103505 = (1, 1, 2, 6, 12, 20, 30, 56, 72,...).

CROSSREFS

Cf. A103505.

Sequence in context: A176224 A174640 A138169 * A173886 A090441 A155794

Adjacent sequences:  A139328 A139329 A139330 * A139332 A139333 A139334

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson and Roger L. Bagula, Apr 13 2008

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified October 30 19:49 EDT 2014. Contains 248837 sequences.