OFFSET
1,3
EXAMPLE
Rows with power sets of set of numbers from 1 to n (without nonempty sets):
{1};
{1}, {2}, {1, 2};
{1}, {2}, {3}, {1, 2}, {1, 3}, {2, 3}, {1, 2, 3};
...
Rows with the sum of elements of these subsets:
1;
1, 2, 3;
1, 2, 3, 3, 4, 5, 6;
...
Concatenation: 1, 1, 2, 3, 1, 2, 3, 3, 4, 5, 6, ...
CROSSREFS
KEYWORD
nonn
AUTHOR
Jaroslav Krizek, Feb 24 2017
STATUS
approved