A131997 - OEIS

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A131997

Array read by rows in which the n-th row contains odd numbers of all possible prime signatures with n divisors.

0

1, 3, 9, 27, 15, 81, 243, 45, 729, 2187, 135, 105, 6561, 225, 19683, 405, 59049, 177147, 1215, 315, 675

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

LINKS

Table of n, a(n) for n=1..21.

EXAMPLE

Row 12 of A131886 is 2048 96 72 60 so here row 12 is 177147 1215 315 675.

CROSSREFS

Cf. A001055, A025487, A050322, A057567, A077569, A108464, A122819, A130839, A131802, A131886.

Sequence in context: A272584 A070359 A271015 * A122842 A070358 A321542

Adjacent sequences: A131994 A131995 A131996 * A131998 A131999 A132000

KEYWORD

nonn,tabf,more

AUTHOR

Alford Arnold, Aug 18 2007

STATUS

approved