

A282903


Concatenation of elements of P{d_1}, P{d_2}, P{d_3}, ..., P{d_n}; where P{d_n} denote the power set of the set of divisors of n ordered by the size of the subsets, and in each subset, following the increasing order.


3



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, 1, 2, 3, 6, 1, 2, 1, 3, 1, 6, 2, 3, 2, 6, 3, 6, 1, 2, 3, 1, 2, 6, 1, 3, 6, 2, 3, 6, 1, 2, 3, 6, 1, 7, 1, 7, 1, 2, 4, 8, 1, 2, 1, 4, 1, 8, 2, 4, 2, 8, 4, 8, 1, 2, 4, 1, 2, 8, 1, 4, 8, 2
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

1,3


LINKS

Table of n, a(n) for n=1..87.


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

Cf. A193360 (concatenation of P{1..n}).
Sequence in context: A268187 A232440 A278538 * A090329 A224876 A027353
Adjacent sequences: A282900 A282901 A282902 * A282904 A282905 A282906


KEYWORD

nonn


AUTHOR

Jaroslav Krizek, Feb 24 2017


STATUS

approved



