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A173607 a(1) = 1, for n >= 2; a(n) = the smallest number h such that tau(h) = A000005(h) = 3 * a(n-1). 8
1, 4, 60, 277200 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

The next term is too large to include.

LINKS

Table of n, a(n) for n=1..4.

FORMULA

A000005(a(n)) = 3 * a(n-1) for n >= 2.

CROSSREFS

Cf. A014221, A173603, A173604, A173605, A173606, A173608, A173609, A171959, A173011.

Sequence in context: A132627 A229771 A136385 * A071582 A158300 A129452

Adjacent sequences:  A173604 A173605 A173606 * A173608 A173609 A173610

KEYWORD

nonn

AUTHOR

Jaroslav Krizek, Nov 06 2010

STATUS

approved

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Last modified October 19 04:40 EDT 2019. Contains 328211 sequences. (Running on oeis4.)