OFFSET
1,3
EXAMPLE
Rows with power sets of set of divisors of n (without nonempty sets):
{1};
{1}, {2}, {1, 2};
{1}, {3}, {1, 3};
{1}, {2}, {4}, {1, 2}, {1, 4}, {2, 4}, {1, 2, 4};
...
Rows with the products of elements of these subsets:
1;
1, 2, 2;
1, 3, 3;
1, 2, 4, 2, 4, 8, 8;
...
Concatenation: 1, 1, 2, 2, 1, 3, 3, 1, 2, 4, 2, 4, 8, 8, ...
CROSSREFS
KEYWORD
nonn
AUTHOR
Jaroslav Krizek, Feb 25 2017
STATUS
approved