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A282936 Concatenation of the products 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. 2
1, 1, 2, 2, 1, 3, 3, 1, 2, 4, 2, 4, 8, 8, 1, 5, 5, 1, 2, 3, 6, 2, 3, 6, 6, 12, 18, 6, 12, 18, 36, 36, 1, 7, 7, 1, 2, 4, 8, 2, 4, 8, 8, 16, 32, 8, 16, 32, 64, 64, 1, 3, 9, 3, 9, 27, 27, 1, 2, 5, 10, 2, 5, 10, 10, 20, 50, 10, 20, 50, 100, 100, 1, 11, 11, 1, 2, 3 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..78.

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

Cf. A282903, A282934, A282935.

Sequence in context: A178568 A104660 A212125 * A220073 A272020 A264263

Adjacent sequences:  A282933 A282934 A282935 * A282937 A282938 A282939

KEYWORD

nonn

AUTHOR

Jaroslav Krizek, Feb 25 2017

STATUS

approved

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Last modified March 25 03:50 EDT 2019. Contains 321450 sequences. (Running on oeis4.)