|
| |
| |
|
|
|
1, 2, 1, 2, 2, 1, 2, 4, 2, 1, 2, 4, 6, 2, 1, 2, 6, 6, 8, 2, 12, 6, 12, 8, 10, 2, 1, 2, 8, 12, 20, 10, 12, 2, 1, 2, 8, 20, 20, 30, 12, 14, 2, 1, 2, 10, 20, 40, 30, 42, 14, 16, 2, 1
(list; table; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,2
|
|
|
COMMENTS
| Row sums = A001595: (1, 3, 5, 9, 15, 25, 41, 67,...). A131241 = 3*A046854 - 2*I.
|
|
|
FORMULA
| 2*A046854 - Identity matrix, where A046854 = Pascal's triangle with repeats by columns.
|
|
|
EXAMPLE
| First few rows of the triangle are:
1;
2, 1;
2, 2, 1;
2, 4, 2, 1;
2, 4, 6, 2, 1;
2, 6, 6, 8, 2, 1;
2, 6, 12, 8, 10, 2, 1;
...
|
|
|
CROSSREFS
| Cf. A001595, A046854, A131241.
Sequence in context: A140186 A078498 A178522 * A107027 A107030 A050362
Adjacent sequences: A131237 A131238 A131239 * A131241 A131242 A131243
|
|
|
KEYWORD
| nonn,tabl
|
|
|
AUTHOR
| Gary W. Adamson (qntmpkt(AT)yahoo.com), Jun 21 2007
|
| |
|
|
