login
A134674
2
1, 2, 2, 3, 3, 3, 4, 3, 4, 4, 5, 5, 5, 5, 5, 5, 3, 4, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 8, 8, 8, 8, 8, 7, 7, 9, 9, 9, 9, 9, 9, 7, 5, 6, 6, 6, 10, 10, 10, 10, 10
OFFSET
1,2
COMMENTS
Left column = A073757: (1, 2, 3, 4, 5, 5, 7, 8, 8, 7, ...).
Row sums = A134675: (1, 4, 9, 15, 25, 30, 49, 55, 80, ...).
n-th row (n>1) has n terms of "n", iff n is prime.
FORMULA
A134673 * A000012 as infinite lower triangular matrices. Triangle, partial sums of A134673 starting from the right of each row.
A134674(n,k) = Sum_{j=n-k+1..n} A134673(n,j).
EXAMPLE
First few rows of the triangle:
1;
2, 2;
3, 3, 3;
4, 3, 4, 4;
5, 5, 5, 5, 5;
5, 3, 4, 6, 6, 6;
7, 7, 7, 7, 7, 7, 7;
7, 6, 5, 5, 8, 8, 8, 8;
8, 7, 7, 9, 9, 9, 9, 9, 9;
7, 5, 6, 6, 6, 10, 10, 10, 10, 10;
...
CROSSREFS
KEYWORD
nonn,tabl,more
AUTHOR
Gary W. Adamson, Nov 05 2007
STATUS
approved