login
A131033
3
1, 3, 1, 4, 2, 1, 5, 2, 2, 1, 6, 2, 2, 2, 1, 7, 2, 2, 2, 2, 1, 8, 2, 2, 2, 2, 2, 1, 9, 2, 2, 2, 2, 2, 2, 1, 10, 2, 2, 2, 2, 2, 2, 2, 1, 11, 2, 2, 2, 2, 2, 2, 2, 2, 1, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 13, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 14, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1
OFFSET
1,2
COMMENTS
Row sums give A016777.
A131032 = A097806 * A130296. [corrected by Georg Fischer, Oct 10 2021]
FORMULA
A130296 * A097806 as infinite lower triangular matrices; where A130296 = (1; 2,1; 3,1,1;...) and A097806 = the pairwise operator.
EXAMPLE
First few rows of the triangle are:
1;
3, 1;
4, 2, 1;
5, 2, 2, 1;
6, 2, 2, 2, 1;
7, 2, 2, 2, 2, 1;
...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Gary W. Adamson, Jun 10 2007
EXTENSIONS
Definition corrected, a(36)=2 inserted and more terms from Georg Fischer, Oct 10 2021
More terms from Michel Marcus, Oct 11 2021
STATUS
approved