|
| |
| |
|
|
|
1, 2, 1, 3, 2, 3, 4, 3, 6, 5, 5, 4, 9, 10, 7, 6, 5, 12, 15, 14, 9, 7, 6, 15, 10, 21, 18, 11, 8, 7, 18, 25, 28, 27, 22, 13, 9, 8, 21, 30, 35, 36, 33, 26, 15, 10, 9, 24, 35, 42, 45, 44, 39, 30, 17, 11, 10, 27, 40, 49, 54, 55, 52, 45, 34, 19
(list;
table;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,2
|
|
|
COMMENTS
|
The operation (2*A144328 - A000012) creates a crescendo triangle with the first n terms of the sequence (1, 1, 3, 5, 7,...) as the n-th row.
Row sums = A081489: (1, 3, 8, 18, 35, 61, 98, 148,...).
|
|
|
LINKS
|
Table of n, a(n) for n=1..66.
|
|
|
EXAMPLE
|
First few rows of the triangle =
1;
2, 1;
3, 2, 3;
4, 3, 6, 5;
5, 4, 9, 10, 7;
6, 5, 12, 15, 14, 9;
7, 6, 15, 20, 21, 18, 11;
8, 7, 18, 25, 28, 27, 22, 13;
9, 8, 21, 30, 35, 36, 33, 26, 15;
10, 9, 24, 35, 42, 45, 44, 39, 30, 17;
...
|
|
|
CROSSREFS
|
Cf. A144328, A081489.
Sequence in context: A201592 A115872 A133926 * A143929 A153583 A029163
Adjacent sequences: A144334 A144335 A144336 * A144338 A144339 A144340
|
|
|
KEYWORD
|
nonn,tabl
|
|
|
AUTHOR
|
Gary W. Adamson & Roger L. Bagula, Sep 18 2008
|
|
|
STATUS
|
approved
|
| |
|
|
