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A171959 a(1) = 0, for n >= 2; a(n) = the smallest number h such that tau(h) = A000005(h) = a(n-1) + 3. 9
0, 4, 64, 73786976294838206464 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(5) = 2^44210291368986342 * 3^1668 is too large to include.

LINKS

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

FORMULA

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

For n>1, a(n) = A005179(a(n-1) + 3).

CROSSREFS

Cf. A014221, A173603, A173604, A173605, A173606, A173607, A173608, A173609, A173011.

Sequence in context: A234608 A119601 A058438 * A041119 A278547 A293562

Adjacent sequences:  A171956 A171957 A171958 * A171960 A171961 A171962

KEYWORD

nonn

AUTHOR

Jaroslav Krizek, Nov 06 2010

STATUS

approved

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Last modified July 30 23:12 EDT 2021. Contains 346365 sequences. (Running on oeis4.)