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!)
A115215 Sequence obtained by reading the triangles shown below by diagonals. 1
1, 1, 3, 2, 1, 3, 6, 2, 5, 4, 1, 3, 6, 10, 2, 5, 9, 4, 8, 7, 1, 3, 6, 10, 15, 2, 5, 9, 14, 4, 8, 13, 7, 12, 11, 1, 3, 6, 10, 15, 21, 2, 5, 9, 14, 20, 4, 5, 8, 13, 19, 7, 12, 18, 11, 17, 16, 1, 3, 6, 10, 15, 21, 28, 2, 5, 9, 14, 20, 27, 4, 8, 13, 19, 26, 7, 12, 18, 25, 11, 17, 24, 16, 23, 22 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
LINKS
EXAMPLE
1
1
2 3
1
2 3
4 5 6
1
2 3
4 5 6
7 8 9 10
1
2 3
4 5 6
7 8 9 10
11 12 13 14 15
CROSSREFS
See A124171 for another version.
Sequence in context: A244477 A035572 A325531 * A335012 A158275 A147750
KEYWORD
nonn
AUTHOR
Colm Mulcahy, Dec 05 2006
EXTENSIONS
More terms from Jonathan R. Love (japanada11(AT)yahoo.ca), Mar 07 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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 29 08:13 EDT 2024. Contains 371265 sequences. (Running on oeis4.)