[go: up one dir, main page]

login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A134513
1
1, 1, 1, 1, 1, 1, 2, 2, 1, 1, 1, 3, 3, 1, 1, 3, 3, 4, 4, 1, 1, 1, 6, 6, 5, 5, 1, 1, 4, 4, 10, 10, 6, 6, 1, 1, 1, 10, 10, 15, 15, 7, 7, 1, 1, 5, 5, 20, 20, 21, 21, 8, 8, 1, 1
OFFSET
1,7
COMMENTS
Row sums = A062114: (1, 2, 3, 6, 9, 16, 25, 42, 67, ...).
Triangle A046854 = A097806 * A049310.
FORMULA
A049310 * A097806 as infinite lower triangular matrices.
EXAMPLE
First few rows of the triangle:
1;
1, 1;
1, 1, 1;
2, 2, 1, 1;
1, 3, 3, 1, 1;
3, 3, 4, 4, 1, 1;
1, 6, 6, 5, 5, 1, 1;
4, 4, 10, 10, 6, 6, 1, 1;
1, 10, 10, 15, 15, 7, 7, 1, 1;
...
CROSSREFS
KEYWORD
nonn,tabl,more
AUTHOR
Gary W. Adamson, Oct 28 2007
STATUS
approved