|
Search: id:A131875
|
|
| |
|
| 1, 5, 4, 12, 5, 7, 22, 6, 8, 10, 35, 7, 9, 11, 13, 51, 8, 10, 12, 14, 16, 70, 9, 11, 13, 15, 17, 19, 92, 10, 12, 14, 16, 18, 20, 22, 117, 11, 13, 15, 17, 19, 21, 23, 25, 145, 12, 14, 16, 18, 20, 22, 24, 26, 28
(list; table; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
COMMENT
|
Left column = pentagonal numbers, A000326: (1, 5, 12, 22,...). Row sums = A001106: (1, 9, 24, 46, 75, 111,...).
|
|
FORMULA
|
A000012 * A131844 as infinite lower triangular matrices.
|
|
EXAMPLE
|
First few rows of the triangle are:
1;
5, 4;
12, 5, 7;
22, 6, 8, 10;
35, 7, 9, 11, 13;
51, 8, 10, 12, 14, 16;
70, 9, 11, 13, 15, 17, 19;
92, 10, 12, 14, 16, 18, 20, 22;
...
|
|
CROSSREFS
|
Cf. A131844, A001106, A000326.
Adjacent sequences: A131872 A131873 A131874 this_sequence A131876 A131877 A131878
Sequence in context: A165367 A140869 A166549 this_sequence A095871 A019068 A147685
|
|
KEYWORD
|
nonn,tabl
|
|
AUTHOR
|
Gary W. Adamson (qntmpkt(AT)yahoo.com), Jul 22 2007
|
|
|
Search completed in 0.002 seconds
|
