|
Search: id:A135091
|
|
| |
|
| 1, 1, 1, 1, 2, 3, 1, 3, 9, 7, 1, 4, 18, 28, 19, 1, 5, 30, 70, 95, 51, 1, 6, 45, 140, 285, 306, 141, 1, 7, 63, 245, 665, 1071, 987, 393, 1, 8, 84, 392, 1330, 2856, 3948, 3144, 1107, 1, 9, 108, 588, 2394, 6426, 11844, 14148, 9963, 3139
(list; table; graph; listen)
|
|
|
OFFSET
|
0,5
|
|
|
COMMENT
|
Right border = A002426. Row sums = A000984: (1, 2, 6, 20, 70, 252,...).
|
|
FORMULA
|
A007318 * triangle M, where M = A002426 * 0^(n-k), 0<=k<=n; i.e. M = an infinite lower triangular matrix with A002426 as the right border and the rest zeros.
|
|
EXAMPLE
|
First few rows of the triangle are:
1;
1, 1;
1, 2, 3;
1, 3, 9, 7;
1, 4, 18, 28, 19;
1, 5, 30, 70, 95, 51;
1, 6, 45, 140, 285, 306, 141;
1, 7, 63, 245, 665, 1071, 987, 393;
...
|
|
CROSSREFS
|
Cf. A002426, A000984.
Adjacent sequences: A135088 A135089 A135090 this_sequence A135092 A135093 A135094
Sequence in context: A139633 A152440 A134319 this_sequence A111589 A010027 A151880
|
|
KEYWORD
|
nonn,tabl
|
|
AUTHOR
|
Gary W. Adamson (qntmpkt(AT)yahoo.com), Nov 18 2007
|
|
|
Search completed in 0.002 seconds
|
