|
| |
|
|
A173108
|
|
Triangle, A000110 in every column >0, shifted down twice.
|
|
3
|
|
|
|
1, 1, 2, 1, 5, 1, 15, 2, 1, 52, 5, 1, 203, 15, 2, 1, 877, 52, 5, 1, 4140, 203, 15, 2, 1, 21147, 877, 52, 5, 1, 115975, 4140, 203, 15, 2, 1
(list;
table;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
0,3
|
|
|
COMMENTS
|
Row sums = A173109: (1, 1, 3, 6, 18, 58, 221, 935,...)
Let the triangle = M. Then Lim_{n->inf.} M^n = A173110: (1, 1, 3, 6, 20, 60,...).
|
|
|
LINKS
|
Table of n, a(n) for n=0..35.
|
|
|
FORMULA
|
Bell sequence in every column, for columns >0, shifted down twice.
|
|
|
EXAMPLE
|
First few rows of the triangle =
1;
1;
2, 1;
5, 1;
15, 2, 1;
52, 5, 1;
203, 15, 2, 1;
877, 52, 5, 1;
4140, 203, 15, 2, 1;
21147, 877, 52, 5, 1;
115975, 4140, 203, 15, 2, 1;
...
|
|
|
CROSSREFS
|
Cf. A000110, A173109, A173110, A173111
Sequence in context: A163963 A119763 A092142 * A173111 A140879 A006556
Adjacent sequences: A173105 A173106 A173107 * A173109 A173110 A173111
|
|
|
KEYWORD
|
nonn,tabl
|
|
|
AUTHOR
|
Gary W. Adamson, Feb 09 2010
|
|
|
STATUS
|
approved
|
| |
|
|
