|
Search: id:A110769
|
|
|
| A110769 |
|
The r-th term of the n-th row of the following triangle contains sum of r successive numbers in decreasing order beginning from T(n)-T(r-1) where T(n) is the n-th triangular number. 1 3 3 6 9 6 10 17 18 10 15 27 33 30 15 ... Sequence contains the triangle by rows. |
|
+0
4
|
|
| 1, 3, 3, 6, 9, 6, 10, 17, 18, 10, 15, 27, 33, 30, 15, 21, 39, 51, 54, 45, 21, 28, 53, 72, 82, 80, 63, 28, 36, 69, 96, 114, 120, 111, 84, 36, 45, 87, 123, 150, 165, 165, 147, 108, 45, 55, 107, 153, 190, 215, 225, 217, 188, 135, 55, 66, 129, 186, 234, 270, 291, 294, 276
(list; table; graph; listen)
|
|
|
OFFSET
|
1,2
|
|
|
COMMENT
|
The first term in the n-th row is T(n) and the n-th term also is T(n). - Joshua Zucker (joshua.zucker(AT)stanfordalumni.org), Dec 14 2005
|
|
EXAMPLE
|
For n = 4 the terms of the 4-th row are 10, 9+8, 7+6+5, 4+3+2+1.
|
|
CROSSREFS
|
Cf. A110768.
Sequence in context: A026804 A104715 A164743 this_sequence A093445 A098358 A136289
Adjacent sequences: A110766 A110767 A110768 this_sequence A110770 A110771 A110772
|
|
KEYWORD
|
easy,tabl,nonn
|
|
AUTHOR
|
Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Aug 12 2005
|
|
EXTENSIONS
|
Corrected and extended by Joshua Zucker (joshua.zucker(AT)stanfordalumni.org), Dec 14 2005
|
|
|
Search completed in 0.002 seconds
|
