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A182762 Number of ordered factorizations of A025487(n) as A025487(j) * A025487(k). 3
1, 2, 3, 2, 4, 4, 5, 6, 2, 6, 3, 8, 4, 7, 6, 10, 6, 8, 9, 4, 12, 2, 4, 8, 9, 12, 8, 14, 4, 8, 10, 10, 15, 12, 16, 6, 12, 3, 12, 11, 6, 18, 4, 5, 16, 18, 8, 16, 6, 14, 12, 12, 21, 2, 8, 10, 20, 20, 10, 20, 9, 16, 13, 18, 24 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

A025487(j) and A025487(k) need not be distinct.

Because multiplying two members of A025487 always produces a member of A025487, the value of this function for all nonmembers of A025487 is 0.

LINKS

Table of n, a(n) for n=1..65.

FORMULA

a(n) = A000005(A181815(n)).

EXAMPLE

36 has three different ordered factorizations into two members of A025487 (36 = 1*36 = 6*6 = 36*1). Therefore, since 36 = A025487(11), a(11) = 3.

CROSSREFS

Cf. A181815.

Sequence in context: A249870 A145394 A179806 * A173997 A029143 A153846

Adjacent sequences:  A182759 A182760 A182761 * A182763 A182764 A182765

KEYWORD

nonn

AUTHOR

Matthew Vandermast, Nov 30 2010

STATUS

approved

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Last modified August 28 18:07 EDT 2015. Contains 261154 sequences.