A282934 - OEIS

A282934

Concatenation of the numbers 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.

1, 1, 1, 2, 1, 1, 2, 1, 1, 1, 2, 2, 2, 3, 1, 1, 2, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 4, 1, 1, 2, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 4, 1, 1, 1, 2, 2, 2, 3, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 4, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2

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OFFSET

1,4

LINKS

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

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};

...