OFFSET

1,3

EXAMPLE

Rows with power sets 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};

{1}, {5}, {1, 5};

...

Concatenation: 1, 1, 2, 1, 2, 1, 3, 1, 3, ...

CROSSREFS

KEYWORD

nonn

AUTHOR

Jaroslav Krizek, Feb 24 2017

STATUS

approved