|
Search: id:A131914
|
|
| |
|
| 1, 4, 2, 7, 5, 3, 10, 8, 6, 4, 13, 11, 9, 7, 5, 16, 14, 12, 10, 8, 6, 19, 17, 15, 13, 11, 9, 7, 22, 20, 18, 16, 14, 12, 10, 8, 25, 23, 21, 19, 17, 15, 13, 11, 9, 28, 26, 24, 22, 20, 18, 16, 14, 12, 10
(list; table; graph; listen)
|
|
|
OFFSET
|
1,2
|
|
|
COMMENT
|
Row sums = the hexagonal numbers, A000384: (1, 6, 15, 28, 45,...).
|
|
FORMULA
|
3*A002024 - 2*A051340 as infinite lower triangular matrices.
|
|
EXAMPLE
|
First few rows of the triangle are:
1;
4, 2;
7, 5, 3;
10, 8, 6, 4;
13, 11, 9, 7, 5;
16, 14, 12, 10, 8, 6;
19, 17, 15, 13, 11, 9, 7;
...
|
|
CROSSREFS
|
Cf. A002024, A051340, A000384.
Sequence in context: A130849 A138754 A021963 this_sequence A115302 A109857 A002560
Adjacent sequences: A131911 A131912 A131913 this_sequence A131915 A131916 A131917
|
|
KEYWORD
|
nonn,tabl
|
|
AUTHOR
|
Gary W. Adamson (qntmpkt(AT)yahoo.com), Jul 27 2007
|
|
|
Search completed in 0.002 seconds
|
