The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
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!)
A272172 Triangle read by rows: T(n,k) in which row n lists the first n terms of A000203 in reverse order. 4
1, 3, 1, 4, 3, 1, 7, 4, 3, 1, 6, 7, 4, 3, 1, 12, 6, 7, 4, 3, 1, 8, 12, 6, 7, 4, 3, 1, 15, 8, 12, 6, 7, 4, 3, 1, 13, 15, 8, 12, 6, 7, 4, 3, 1, 18, 13, 15, 8, 12, 6, 7, 4, 3, 1, 12, 18, 13, 15, 8, 12, 6, 7, 4, 3, 1, 28, 12, 18, 13, 15, 8, 12, 6, 7, 4, 3, 1, 14, 28, 12, 18, 13, 15, 8, 12, 6, 7, 4, 3, 1, 24, 14, 28 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
FORMULA
a(n) = A000203(A004736(n)).
T(n,k) = A000203(n-k+1).
EXAMPLE
Triangle begins:
1;
3, 1;
4, 3, 1;
7, 4, 3, 1;
6, 7, 4, 3, 1;
12, 6, 7, 4, 3, 1;
8, 12, 6, 7, 4, 3, 1;
15, 8, 12, 6, 7, 4, 3, 1;
13, 15, 8, 12, 6, 7, 4, 3, 1;
18, 13, 15, 8, 12, 6, 7, 4, 3, 1;
12, 18, 13, 15, 8, 12, 6, 7, 4, 3, 1;
28, 12, 18, 13, 15, 8, 12, 6, 7, 4, 3, 1;
...
CROSSREFS
Mirror of A245093.
Column k gives A000203 starting in row k.
Row sums give A024916.
Sequence in context: A030758 A347065 A322103 * A104764 A152842 A307280
KEYWORD
nonn,tabl
AUTHOR
Omar E. Pol, Apr 21 2016
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 May 18 09:54 EDT 2024. Contains 372620 sequences. (Running on oeis4.)