login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A143908 Eigentriangle by rows, n terms of (3 * A026150) followed by A026150(n). 1
1, 3, 1, 3, 3, 4, 3, 3, 12, 10, 3, 3, 12, 30, 28, 3, 3, 12, 30, 84, 76, 3, 3, 12, 30, 84, 228, 208, 3, 3, 12, 30, 84, 228, 624, 568, 3, 3, 12, 30, 84, 228, 624, 1704, 1552 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
0,2
COMMENTS
Right border = A026150: (1, 1, 4, 10, 28, 76, 208, 568,...).
Row sums = (1, 4, 10, 28, 76,...) = INVERT transform of (1, 3, 3, 3,...).
Sum of n-th row terms = rightmost term of next row.
LINKS
FORMULA
Eigentriangle by rows, n terms of (3 * A026150) followed by A026150(n).
EXAMPLE
First few rows of the triangle =
1;
3, 1;
3, 3, 4;
3, 3, 12, 10;
3, 3, 12, 30, 28;
3, 3, 12, 30, 84, 76;
3, 3, 12, 30, 84, 228, 208;
...
CROSSREFS
Sequence in context: A244965 A049996 A344793 * A349814 A117572 A029153
KEYWORD
nonn,tabl
AUTHOR
Gary W. Adamson, Sep 06 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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 29 00:26 EDT 2024. Contains 371264 sequences. (Running on oeis4.)